diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02af337..b12c07b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 
 ### Changed
 
+- Change JVM version to `21`
 - Upgrade Gradle Wrapper to `8.13`
 - Update `platformVersion` to `2024.2.5`
 - Change since/until build to `242-252.*` (2024.2-2025.2.*)
diff --git a/build.gradle.kts b/build.gradle.kts
index e6c6848..4443f22 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -16,7 +16,7 @@ version = providers.gradleProperty("pluginVersion").get()
 
 // Set the JVM language level used to build the project.
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(21)
 }
 
 // Configure project's dependencies