diff --git a/bom/application/pom.xml b/bom/application/pom.xml
index db8651792215e..ec7dc32783aa0 100644
--- a/bom/application/pom.xml
+++ b/bom/application/pom.xml
@@ -158,7 +158,7 @@
         <aws-xray.version>2.14.0</aws-xray.version>
         <azure-functions-java-library.version>2.2.0</azure-functions-java-library.version>
         <azure-functions-java-spi.version>1.0.0</azure-functions-java-spi.version>
-        <kotlin.version>1.9.10</kotlin.version>
+        <kotlin.version>1.9.20</kotlin.version>
         <kotlin.coroutine.version>1.7.3</kotlin.coroutine.version>
         <azure.toolkit-lib.version>0.27.0</azure.toolkit-lib.version>
         <kotlin-serialization.version>1.6.0</kotlin-serialization.version>
diff --git a/build-parent/pom.xml b/build-parent/pom.xml
index e22da92a4c227..d501d3134a319 100644
--- a/build-parent/pom.xml
+++ b/build-parent/pom.xml
@@ -20,7 +20,7 @@
 
         <!-- These properties are needed in order for them to be resolvable by the generated projects -->
         <compiler-plugin.version>3.11.0</compiler-plugin.version>
-        <kotlin.version>1.9.10</kotlin.version>
+        <kotlin.version>1.9.20</kotlin.version>
         <dokka.version>1.9.10</dokka.version>
         <scala.version>2.13.8</scala.version>
         <scala-maven-plugin.version>4.8.1</scala-maven-plugin.version>
diff --git a/devtools/gradle/gradle-application-plugin/src/test/java/io/quarkus/gradle/QuarkusPluginTest.java b/devtools/gradle/gradle-application-plugin/src/test/java/io/quarkus/gradle/QuarkusPluginTest.java
index 580777c029f6d..a6be43a0e10b6 100644
--- a/devtools/gradle/gradle-application-plugin/src/test/java/io/quarkus/gradle/QuarkusPluginTest.java
+++ b/devtools/gradle/gradle-application-plugin/src/test/java/io/quarkus/gradle/QuarkusPluginTest.java
@@ -105,7 +105,7 @@ public void shouldReturnMultipleOutputSourceDirectories() {
 
     @Test
     public void shouldNotFailOnProjectDependenciesWithoutMain(@TempDir Path testProjectDir) throws IOException {
-        var kotlinVersion = System.getProperty("kotlin_version", "1.9.10");
+        var kotlinVersion = System.getProperty("kotlin_version", "1.9.20");
         var settingFile = testProjectDir.resolve("settings.gradle.kts");
         var mppProjectDir = testProjectDir.resolve("mpp");
         var quarkusProjectDir = testProjectDir.resolve("quarkus");
diff --git a/independent-projects/arc/pom.xml b/independent-projects/arc/pom.xml
index fd08a481c9233..192d80007558c 100644
--- a/independent-projects/arc/pom.xml
+++ b/independent-projects/arc/pom.xml
@@ -55,7 +55,7 @@
         <!-- test versions -->
         <version.assertj>3.24.2</version.assertj>
         <version.junit5>5.10.0</version.junit5>
-        <version.kotlin>1.9.10</version.kotlin>
+        <version.kotlin>1.9.20</version.kotlin>
         <version.kotlin-coroutines>1.7.3</version.kotlin-coroutines>
         <version.mockito>5.4.0</version.mockito>
         <!-- TCK versions -->
diff --git a/integration-tests/gradle/src/main/resources/conditional-dependencies-kotlin/build.gradle.kts b/integration-tests/gradle/src/main/resources/conditional-dependencies-kotlin/build.gradle.kts
index e5d23bacc50de..553fa42945faa 100644
--- a/integration-tests/gradle/src/main/resources/conditional-dependencies-kotlin/build.gradle.kts
+++ b/integration-tests/gradle/src/main/resources/conditional-dependencies-kotlin/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
-    kotlin("jvm") version "1.9.10"
-    kotlin("plugin.allopen") version "1.9.10"
+    kotlin("jvm") version "1.9.20"
+    kotlin("plugin.allopen") version "1.9.20"
     id("io.quarkus")
 }