diff --git a/build-parent/pom.xml b/build-parent/pom.xml
index cc7f3002da4d3..349696b7b323e 100644
--- a/build-parent/pom.xml
+++ b/build-parent/pom.xml
@@ -83,12 +83,12 @@
         <volume.access.modifier>:Z</volume.access.modifier>
 
         <!-- Defaults for integration tests -->
-        <elasticsearch-server.version>8.12.1</elasticsearch-server.version>
+        <elasticsearch-server.version>8.13.2</elasticsearch-server.version>
         <elasticsearch.image>docker.io/elastic/elasticsearch:${elasticsearch-server.version}</elasticsearch.image>
         <logstash.image>docker.io/elastic/logstash:${elasticsearch-server.version}</logstash.image>
         <kibana.image>docker.io/elastic/kibana:${elasticsearch-server.version}</kibana.image>
         <elasticsearch.protocol>http</elasticsearch.protocol>
-        <opensearch-server.version>2.11.1</opensearch-server.version>
+        <opensearch-server.version>2.13.0</opensearch-server.version>
         <opensearch.image>docker.io/opensearchproject/opensearch:${opensearch-server.version}</opensearch.image>
         <opensearch.protocol>http</opensearch.protocol>
         <junit-pioneer.version>2.2.0</junit-pioneer.version>
diff --git a/docs/src/main/asciidoc/hibernate-search-orm-elasticsearch.adoc b/docs/src/main/asciidoc/hibernate-search-orm-elasticsearch.adoc
index d7010af28865f..82faa37cf6a5b 100644
--- a/docs/src/main/asciidoc/hibernate-search-orm-elasticsearch.adoc
+++ b/docs/src/main/asciidoc/hibernate-search-orm-elasticsearch.adoc
@@ -823,7 +823,7 @@ as shown below.
 
 [source,properties]
 ----
-quarkus.hibernate-search-orm.elasticsearch.version=opensearch:2.11
+quarkus.hibernate-search-orm.elasticsearch.version=opensearch:2.13
 ----
 
 All other configuration options and APIs are exactly the same as with Elasticsearch.
diff --git a/docs/src/main/asciidoc/hibernate-search-standalone-elasticsearch.adoc b/docs/src/main/asciidoc/hibernate-search-standalone-elasticsearch.adoc
index 00d750fab9282..6e4fb29c07ae4 100644
--- a/docs/src/main/asciidoc/hibernate-search-standalone-elasticsearch.adoc
+++ b/docs/src/main/asciidoc/hibernate-search-standalone-elasticsearch.adoc
@@ -741,7 +741,7 @@ as shown below.
 
 [source,properties]
 ----
-quarkus.hibernate-search-standalone.elasticsearch.version=opensearch:2.11
+quarkus.hibernate-search-standalone.elasticsearch.version=opensearch:2.13
 ----
 
 All other configuration options and APIs are exactly the same as with Elasticsearch.
diff --git a/extensions/elasticsearch-rest-client-common/deployment/src/main/java/io/quarkus/elasticsearch/restclient/common/deployment/DevServicesElasticsearchProcessor.java b/extensions/elasticsearch-rest-client-common/deployment/src/main/java/io/quarkus/elasticsearch/restclient/common/deployment/DevServicesElasticsearchProcessor.java
index 769dd2f7205a8..2308d705a40e9 100644
--- a/extensions/elasticsearch-rest-client-common/deployment/src/main/java/io/quarkus/elasticsearch/restclient/common/deployment/DevServicesElasticsearchProcessor.java
+++ b/extensions/elasticsearch-rest-client-common/deployment/src/main/java/io/quarkus/elasticsearch/restclient/common/deployment/DevServicesElasticsearchProcessor.java
@@ -238,7 +238,7 @@ private GenericContainer<?> createElasticsearchContainer(ElasticsearchDevService
         // Disable disk-based shard allocation thresholds:
         // in a single-node setup they just don't make sense,
         // and lead to problems on large disks with little space left.
-        // See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+        // See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
         container.addEnv("cluster.routing.allocation.disk.threshold_enabled", "false");
         container.addEnv("ES_JAVA_OPTS", config.javaOpts);
         return container;
@@ -260,6 +260,10 @@ private GenericContainer<?> createOpensearchContainer(ElasticsearchDevServicesBu
         // See https://opensearch.org/docs/latest/api-reference/cluster-api/cluster-settings/
         container.addEnv("cluster.routing.allocation.disk.threshold_enabled", "false");
         container.addEnv("OPENSEARCH_JAVA_OPTS", config.javaOpts);
+        // OpenSearch 2.12 and later requires an admin password, or it won't start.
+        // Considering dev services are transient and not intended for production by nature,
+        // we'll just set some hardcoded password.
+        container.addEnv("OPENSEARCH_INITIAL_ADMIN_PASSWORD", "NotActua11y$trongPa$$word");
         return container;
     }
 
diff --git a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false-and-named-pu-active-true.properties b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false-and-named-pu-active-true.properties
index 188eadaadb8e6..081995a71699b 100644
--- a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false-and-named-pu-active-true.properties
+++ b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false-and-named-pu-active-true.properties
@@ -17,11 +17,11 @@ quarkus.hibernate-orm."namedpu".database.generation=drop-and-create
 
 # Hibernate Search is inactive for the default PU
 quarkus.hibernate-search-orm.active=false
-quarkus.hibernate-search-orm.elasticsearch.version=8.12
+quarkus.hibernate-search-orm.elasticsearch.version=8.13
 quarkus.hibernate-search-orm.elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-orm.schema-management.strategy=drop-and-create-and-drop
 
 # ... but it's (implicitly) active for a named PU
-quarkus.hibernate-search-orm."namedpu".elasticsearch.version=8.12
+quarkus.hibernate-search-orm."namedpu".elasticsearch.version=8.13
 quarkus.hibernate-search-orm."namedpu".elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-orm."namedpu".schema-management.strategy=drop-and-create-and-drop
diff --git a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
index 52608bd073759..1804e4ca0e7df 100644
--- a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
+++ b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
@@ -7,6 +7,6 @@ quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
 quarkus.hibernate-orm.database.generation=drop-and-create
 
 quarkus.hibernate-search-orm.active=false
-quarkus.hibernate-search-orm.elasticsearch.version=8.12
+quarkus.hibernate-search-orm.elasticsearch.version=8.13
 quarkus.hibernate-search-orm.elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-orm.schema-management.strategy=drop-and-create-and-drop
\ No newline at end of file
diff --git a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui.properties b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui.properties
index aa923ae29cb4e..bde3946908e04 100644
--- a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui.properties
+++ b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-devui.properties
@@ -6,6 +6,6 @@ quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
 
 quarkus.hibernate-orm.database.generation=drop-and-create
 
-quarkus.hibernate-search-orm.elasticsearch.version=8.12
+quarkus.hibernate-search-orm.elasticsearch.version=8.13
 quarkus.hibernate-search-orm.elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-orm.schema-management.strategy=drop-and-create-and-drop
\ No newline at end of file
diff --git a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-start-offline.properties b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-start-offline.properties
index 8cadcad4a8d95..6e7974322bc7f 100644
--- a/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-start-offline.properties
+++ b/extensions/hibernate-search-orm-elasticsearch/deployment/src/test/resources/application-start-offline.properties
@@ -3,7 +3,7 @@ quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
 
 quarkus.hibernate-orm.database.generation=drop-and-create
 
-quarkus.hibernate-search-orm.elasticsearch.version=8.12
+quarkus.hibernate-search-orm.elasticsearch.version=8.13
 # Simulate an offline Elasticsearch instance by pointing to a non-existing cluster
 quarkus.hibernate-search-orm.elasticsearch.hosts=localhost:14800
 quarkus.hibernate-search-orm.schema-management.strategy=none
diff --git a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
index 88acdf6870c66..6414c9416ce28 100644
--- a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
+++ b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui-active-false.properties
@@ -2,6 +2,6 @@
 quarkus.devservices.enabled=false
 
 quarkus.hibernate-search-standalone.active=false
-quarkus.hibernate-search-standalone.elasticsearch.version=8.12
+quarkus.hibernate-search-standalone.elasticsearch.version=8.13
 quarkus.hibernate-search-standalone.elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-standalone.schema-management.strategy=drop-and-create-and-drop
\ No newline at end of file
diff --git a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui.properties b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui.properties
index d428fabb0a19e..85771c96daa2b 100644
--- a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui.properties
+++ b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-devui.properties
@@ -1,6 +1,6 @@
 # We already start Elasticsearch with Maven
 quarkus.devservices.enabled=false
 
-quarkus.hibernate-search-standalone.elasticsearch.version=8.12
+quarkus.hibernate-search-standalone.elasticsearch.version=8.13
 quarkus.hibernate-search-standalone.elasticsearch.hosts=${elasticsearch.hosts:localhost:9200}
 quarkus.hibernate-search-standalone.schema-management.strategy=drop-and-create-and-drop
\ No newline at end of file
diff --git a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-start-offline.properties b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-start-offline.properties
index 476885eeb643e..5d2bcd9676b60 100644
--- a/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-start-offline.properties
+++ b/extensions/hibernate-search-standalone-elasticsearch/deployment/src/test/resources/application-start-offline.properties
@@ -1,4 +1,4 @@
-quarkus.hibernate-search-standalone.elasticsearch.version=8.12
+quarkus.hibernate-search-standalone.elasticsearch.version=8.13
 # Simulate an offline Elasticsearch instance by pointing to a non-existing cluster
 quarkus.hibernate-search-standalone.elasticsearch.hosts=localhost:14800
 quarkus.hibernate-search-standalone.schema-management.strategy=none
diff --git a/integration-tests/elasticsearch-java-client/pom.xml b/integration-tests/elasticsearch-java-client/pom.xml
index dc14ebfb51541..ccec9b60217b9 100644
--- a/integration-tests/elasticsearch-java-client/pom.xml
+++ b/integration-tests/elasticsearch-java-client/pom.xml
@@ -170,7 +170,7 @@
                                             <!-- Disable disk-based shard allocation thresholds:
                                                  in a single-node setup they just don't make sense,
                                                  and lead to problems on large disks with little space left.
-                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                                              -->
                                             <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                                             <!-- Disable some features that are not needed in our tests and just slow down startup -->
diff --git a/integration-tests/elasticsearch-rest-client/pom.xml b/integration-tests/elasticsearch-rest-client/pom.xml
index 7aa9df7d935bb..ffd8366460876 100644
--- a/integration-tests/elasticsearch-rest-client/pom.xml
+++ b/integration-tests/elasticsearch-rest-client/pom.xml
@@ -170,7 +170,7 @@
                       <!-- Disable disk-based shard allocation thresholds:
                            in a single-node setup they just don't make sense,
                            and lead to problems on large disks with little space left.
-                           See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                           See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                        -->
                       <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                       <!-- Disable some features that are not needed in our tests and just slow down startup -->
diff --git a/integration-tests/hibernate-search-orm-elasticsearch-outbox-polling/pom.xml b/integration-tests/hibernate-search-orm-elasticsearch-outbox-polling/pom.xml
index 178fb422d602d..5cfd9bc32ece9 100644
--- a/integration-tests/hibernate-search-orm-elasticsearch-outbox-polling/pom.xml
+++ b/integration-tests/hibernate-search-orm-elasticsearch-outbox-polling/pom.xml
@@ -211,7 +211,7 @@
                                             <!-- Disable disk-based shard allocation thresholds:
                                                  in a single-node setup they just don't make sense,
                                                  and lead to problems on large disks with little space left.
-                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                                              -->
                                             <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                                             <!-- Disable some features that are not needed in our tests and just slow down startup -->
diff --git a/integration-tests/hibernate-search-orm-elasticsearch-tenancy/pom.xml b/integration-tests/hibernate-search-orm-elasticsearch-tenancy/pom.xml
index 8449847353d2e..d9a83a0011e1e 100644
--- a/integration-tests/hibernate-search-orm-elasticsearch-tenancy/pom.xml
+++ b/integration-tests/hibernate-search-orm-elasticsearch-tenancy/pom.xml
@@ -231,7 +231,7 @@
                                             <!-- Disable disk-based shard allocation thresholds:
                                                  in a single-node setup they just don't make sense,
                                                  and lead to problems on large disks with little space left.
-                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                                              -->
                                             <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                                             <!-- Disable some features that are not needed in our tests and just slow down startup -->
diff --git a/integration-tests/hibernate-search-orm-elasticsearch/pom.xml b/integration-tests/hibernate-search-orm-elasticsearch/pom.xml
index 43b6e979b6353..e3e8f3e6e1269 100644
--- a/integration-tests/hibernate-search-orm-elasticsearch/pom.xml
+++ b/integration-tests/hibernate-search-orm-elasticsearch/pom.xml
@@ -189,7 +189,7 @@
                                             <!-- Disable disk-based shard allocation thresholds:
                                                  in a single-node setup they just don't make sense,
                                                  and lead to problems on large disks with little space left.
-                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                                              -->
                                             <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                                             <!-- Disable some features that are not needed in our tests and just slow down startup -->
diff --git a/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java b/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
index 5f10e53b649b2..241287f81172b 100644
--- a/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
+++ b/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
@@ -38,7 +38,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to Elasticsearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-orm.elasticsearch.version", "8.12"));
+                    "quarkus.hibernate-search-orm.elasticsearch.version", "8.13"));
             return config;
         }
 
diff --git a/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java b/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
index 9d5ec8bc047b7..d5899b31f1f0e 100644
--- a/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
+++ b/integration-tests/hibernate-search-orm-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/orm/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
@@ -37,7 +37,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to Elasticsearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-orm.elasticsearch.version", "8.12");
+                    "quarkus.hibernate-search-orm.elasticsearch.version", "8.13");
         }
 
         @Override
diff --git a/integration-tests/hibernate-search-orm-opensearch/pom.xml b/integration-tests/hibernate-search-orm-opensearch/pom.xml
index 0dbdd56c2eafc..777a12a84c135 100644
--- a/integration-tests/hibernate-search-orm-opensearch/pom.xml
+++ b/integration-tests/hibernate-search-orm-opensearch/pom.xml
@@ -190,6 +190,9 @@
                                              -->
                                             <plugins.index_state_management.enabled>false</plugins.index_state_management.enabled>
                                             <OPENSEARCH_JAVA_OPTS>-Xms512m -Xmx512m</OPENSEARCH_JAVA_OPTS>
+                                            <!-- OpenSearch 2.12 and later requires an admin password, or it won't start.
+                                                 Considering this is just tests, we'll just set some hardcoded password. -->
+                                            <OPENSEARCH_INITIAL_ADMIN_PASSWORD>NotActua11y$trongPa$$word</OPENSEARCH_INITIAL_ADMIN_PASSWORD>
                                             <!-- Disable disk-based shard allocation thresholds: on large, relatively full disks (>90% used),
                                                  it will lead to index creation to get stuck waiting for other nodes to join the cluster,
                                                  which will never happen since we only have one node.
diff --git a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesConfiguredExplicitlyTest.java b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesConfiguredExplicitlyTest.java
index 957c05ac5cc01..12b7385638b0e 100644
--- a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesConfiguredExplicitlyTest.java
+++ b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesConfiguredExplicitlyTest.java
@@ -26,10 +26,10 @@ public Map<String, String> getConfigOverrides() {
             return Map.of(
                     "quarkus.elasticsearch.devservices.enabled", "true",
                     // This needs to be different from the default image, or the test makes no sense.
-                    "quarkus.elasticsearch.devservices.image-name", "docker.io/opensearchproject/opensearch:2.10.0",
+                    "quarkus.elasticsearch.devservices.image-name", "docker.io/opensearchproject/opensearch:2.12.0",
                     // This needs to match the version used just above,
                     // so that Hibernate Search itself will assert that we're using a custom version.
-                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.10");
+                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.12");
         }
 
         @Override
diff --git a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
index aa8d21d88e571..9b96bb9216fa3 100644
--- a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
+++ b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
@@ -38,7 +38,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to OpenSearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.11"));
+                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.13"));
             return config;
         }
 
diff --git a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
index 895b6e04189a2..63b1a6ebc3bea 100644
--- a/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
+++ b/integration-tests/hibernate-search-orm-opensearch/src/test/java/io/quarkus/it/hibernate/search/orm/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
@@ -37,7 +37,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to OpenSearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.11");
+                    "quarkus.hibernate-search-orm.elasticsearch.version", "opensearch:2.13");
         }
 
         @Override
diff --git a/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java b/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
index 5ddb5b10c36fa..1af8368516271 100644
--- a/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
+++ b/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledExplicitlyTest.java
@@ -38,7 +38,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to Elasticsearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-standalone.elasticsearch.version", "8.12"));
+                    "quarkus.hibernate-search-standalone.elasticsearch.version", "8.13"));
             return config;
         }
 
diff --git a/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java b/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
index 02d03be9b5fcc..d26f55cc46d9d 100644
--- a/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
+++ b/integration-tests/hibernate-search-standalone-elasticsearch/src/test/java/io/quarkus/it/hibernate/search/standalone/elasticsearch/devservices/HibernateSearchElasticsearchDevServicesDisabledImplicitlyTest.java
@@ -37,7 +37,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to Elasticsearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-standalone.elasticsearch.version", "8.12");
+                    "quarkus.hibernate-search-standalone.elasticsearch.version", "8.13");
         }
 
         @Override
diff --git a/integration-tests/hibernate-search-standalone-opensearch/pom.xml b/integration-tests/hibernate-search-standalone-opensearch/pom.xml
index ff1b2abce0291..f0ecaf1746a77 100644
--- a/integration-tests/hibernate-search-standalone-opensearch/pom.xml
+++ b/integration-tests/hibernate-search-standalone-opensearch/pom.xml
@@ -168,6 +168,9 @@
                                              -->
                                             <plugins.index_state_management.enabled>false</plugins.index_state_management.enabled>
                                             <OPENSEARCH_JAVA_OPTS>-Xms512m -Xmx512m</OPENSEARCH_JAVA_OPTS>
+                                            <!-- OpenSearch 2.12 and later requires an admin password, or it won't start.
+                                                 Considering this is just tests, we'll just set some hardcoded password. -->
+                                            <OPENSEARCH_INITIAL_ADMIN_PASSWORD>NotActua11y$trongPa$$word</OPENSEARCH_INITIAL_ADMIN_PASSWORD>
                                             <!-- Disable disk-based shard allocation thresholds: on large, relatively full disks (>90% used),
                                                  it will lead to index creation to get stuck waiting for other nodes to join the cluster,
                                                  which will never happen since we only have one node.
diff --git a/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java b/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
index 065384a55e6ee..71d8d74b754ca 100644
--- a/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
+++ b/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledExplicitlyTest.java
@@ -38,7 +38,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to OpenSearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-standalone.elasticsearch.version", "opensearch:2.9"));
+                    "quarkus.hibernate-search-standalone.elasticsearch.version", "opensearch:2.13"));
             return config;
         }
 
diff --git a/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java b/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
index fb57eb2ecc8de..b32409cf54a5b 100644
--- a/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
+++ b/integration-tests/hibernate-search-standalone-opensearch/src/test/java/io/quarkus/it/hibernate/search/standalone/opensearch/devservices/HibernateSearchOpenSearchDevServicesDisabledImplicitlyTest.java
@@ -37,7 +37,7 @@ public Map<String, String> getConfigOverrides() {
                     // But here it doesn't matter as we won't send a request to OpenSearch anyway,
                     // so we're free to put anything.
                     // Just make sure to set something consistent with what we have in application.properties.
-                    "quarkus.hibernate-search-standalone.elasticsearch.version", "opensearch:2.9");
+                    "quarkus.hibernate-search-standalone.elasticsearch.version", "opensearch:2.13");
         }
 
         @Override
diff --git a/integration-tests/logging-gelf/pom.xml b/integration-tests/logging-gelf/pom.xml
index c2aee04344018..1b1e3a8a8e7ae 100644
--- a/integration-tests/logging-gelf/pom.xml
+++ b/integration-tests/logging-gelf/pom.xml
@@ -162,7 +162,7 @@
                                             <!-- Disable disk-based shard allocation thresholds:
                                                  in a single-node setup they just don't make sense,
                                                  and lead to problems on large disks with little space left.
-                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.12/modules-cluster.html#disk-based-shard-allocation
+                                                 See https://www.elastic.co/guide/en/elasticsearch/reference/8.13/modules-cluster.html#disk-based-shard-allocation
                                              -->
                                             <cluster.routing.allocation.disk.threshold_enabled>false</cluster.routing.allocation.disk.threshold_enabled>
                                             <!-- Disable some features that are not needed in our tests and just slow down startup -->