diff --git a/junit-jupiter-starter-gradle-kotlin/build.gradle.kts b/junit-jupiter-starter-gradle-kotlin/build.gradle.kts
index 5b36be32..fa43783c 100644
--- a/junit-jupiter-starter-gradle-kotlin/build.gradle.kts
+++ b/junit-jupiter-starter-gradle-kotlin/build.gradle.kts
@@ -2,7 +2,7 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-	kotlin("jvm") version "2.3.0"
+	kotlin("jvm") version "2.2.21"
 }
 
 repositories {
diff --git a/junit-jupiter-starter-maven-kotlin/pom.xml b/junit-jupiter-starter-maven-kotlin/pom.xml
index 5566d06d..e5d73b73 100644
--- a/junit-jupiter-starter-maven-kotlin/pom.xml
+++ b/junit-jupiter-starter-maven-kotlin/pom.xml
@@ -10,7 +10,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<kotlin.version>2.3.0</kotlin.version>
+		<kotlin.version>2.2.21</kotlin.version>
 		<maven.compiler.release>17</maven.compiler.release>
         <kotlin.compiler.jvmTarget>${maven.compiler.release}</kotlin.compiler.jvmTarget>
 	</properties>
diff --git a/junit-multiple-engines/build.gradle.kts b/junit-multiple-engines/build.gradle.kts
index a5308f73..e7d9708d 100644
--- a/junit-multiple-engines/build.gradle.kts
+++ b/junit-multiple-engines/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
     groovy
     eclipse // optional (to generate Eclipse project files)
     idea // optional (to generate IntelliJ IDEA project files)
-    kotlin("jvm") version "2.3.0"
+    kotlin("jvm") version "2.2.21"
 }
 
 repositories {