diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a835f408f339..23374838da89c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Update to Apache Lucene 9.11.0 ([#14042](https://github.com/opensearch-project/OpenSearch/pull/14042))
 - Bump `netty` from 4.1.110.Final to 4.1.111.Final ([#14356](https://github.com/opensearch-project/OpenSearch/pull/14356))
 - Bump `org.wiremock:wiremock-standalone` from 3.3.1 to 3.6.0 ([#14361](https://github.com/opensearch-project/OpenSearch/pull/14361))
+- Bump `reactor` from 3.5.17 to 3.5.18 ([#14395](https://github.com/opensearch-project/OpenSearch/pull/14395))
+- Bump `reactor-netty` from 1.1.19 to 1.1.20 ([#14395](https://github.com/opensearch-project/OpenSearch/pull/14395))
 - Bump `commons-net:commons-net` from 3.10.0 to 3.11.1 ([#14396](https://github.com/opensearch-project/OpenSearch/pull/14396))
 - Bump `org.apache.commons:commons-configuration2` from 2.10.1 to 2.11.0 ([#14399](https://github.com/opensearch-project/OpenSearch/pull/14399))
 
diff --git a/buildSrc/version.properties b/buildSrc/version.properties
index 3ff027461f81d..2fe751ef89e44 100644
--- a/buildSrc/version.properties
+++ b/buildSrc/version.properties
@@ -33,8 +33,8 @@ netty             = 4.1.111.Final
 joda              = 2.12.7
 
 # project reactor
-reactor_netty     = 1.1.19
-reactor           = 3.5.17
+reactor_netty     = 1.1.20
+reactor           = 3.5.18
 
 # client dependencies
 httpclient        = 4.5.14
diff --git a/plugins/repository-azure/licenses/reactor-netty-core-1.1.19.jar.sha1 b/plugins/repository-azure/licenses/reactor-netty-core-1.1.19.jar.sha1
deleted file mode 100644
index cbcbfcd87d682..0000000000000
--- a/plugins/repository-azure/licenses/reactor-netty-core-1.1.19.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-639e2c63ade6f2a49d7e501ca2264b74d240b448
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/reactor-netty-core-1.1.20.jar.sha1 b/plugins/repository-azure/licenses/reactor-netty-core-1.1.20.jar.sha1
new file mode 100644
index 0000000000000..2f4d023c88c80
--- /dev/null
+++ b/plugins/repository-azure/licenses/reactor-netty-core-1.1.20.jar.sha1
@@ -0,0 +1 @@
+1a5ef52a470a82d9313e2e1ad8ba064bdbd38948
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/reactor-netty-http-1.1.19.jar.sha1 b/plugins/repository-azure/licenses/reactor-netty-http-1.1.19.jar.sha1
deleted file mode 100644
index 1eeedfc0926f5..0000000000000
--- a/plugins/repository-azure/licenses/reactor-netty-http-1.1.19.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-b4bbb1aeb64ecb2b3949c38983032a7f0b0ebd07
\ No newline at end of file
diff --git a/plugins/repository-azure/licenses/reactor-netty-http-1.1.20.jar.sha1 b/plugins/repository-azure/licenses/reactor-netty-http-1.1.20.jar.sha1
new file mode 100644
index 0000000000000..6c031e00e39c1
--- /dev/null
+++ b/plugins/repository-azure/licenses/reactor-netty-http-1.1.20.jar.sha1
@@ -0,0 +1 @@
+8d4ee98405a5856cf0c9d7c1a70f3f14631e3c46
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.19.jar.sha1 b/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.19.jar.sha1
deleted file mode 100644
index cbcbfcd87d682..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.19.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-639e2c63ade6f2a49d7e501ca2264b74d240b448
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.20.jar.sha1 b/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.20.jar.sha1
new file mode 100644
index 0000000000000..2f4d023c88c80
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.20.jar.sha1
@@ -0,0 +1 @@
+1a5ef52a470a82d9313e2e1ad8ba064bdbd38948
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.19.jar.sha1 b/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.19.jar.sha1
deleted file mode 100644
index 1eeedfc0926f5..0000000000000
--- a/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.19.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-b4bbb1aeb64ecb2b3949c38983032a7f0b0ebd07
\ No newline at end of file
diff --git a/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.20.jar.sha1 b/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.20.jar.sha1
new file mode 100644
index 0000000000000..6c031e00e39c1
--- /dev/null
+++ b/plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.20.jar.sha1
@@ -0,0 +1 @@
+8d4ee98405a5856cf0c9d7c1a70f3f14631e3c46
\ No newline at end of file
diff --git a/server/licenses/reactor-core-3.5.17.jar.sha1 b/server/licenses/reactor-core-3.5.17.jar.sha1
deleted file mode 100644
index 6663356bab047..0000000000000
--- a/server/licenses/reactor-core-3.5.17.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-2cf9b080e3a2d8a5a39948260db5fd1dae54c3ac
\ No newline at end of file
diff --git a/server/licenses/reactor-core-3.5.18.jar.sha1 b/server/licenses/reactor-core-3.5.18.jar.sha1
new file mode 100644
index 0000000000000..c503f768beafa
--- /dev/null
+++ b/server/licenses/reactor-core-3.5.18.jar.sha1
@@ -0,0 +1 @@
+3a8157f7d66d71a407eb77ba12bce72a38c5b4da
\ No newline at end of file