diff --git a/examples/lambda/build.gradle.kts b/examples/lambda/build.gradle.kts
index 3e70b21fb..ea1567fd3 100644
--- a/examples/lambda/build.gradle.kts
+++ b/examples/lambda/build.gradle.kts
@@ -19,7 +19,7 @@ dependencies {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }