diff --git a/extensions/amazon-lambda-rest/runtime/src/main/java/io/quarkus/amazon/lambda/http/graal/LambdaContainerHandlerSubstitution.java b/extensions/amazon-lambda-rest/runtime/src/main/java/io/quarkus/amazon/lambda/http/graal/LambdaContainerHandlerSubstitution.java
index e2f2ede57953a..d1c9ffebdd196 100644
--- a/extensions/amazon-lambda-rest/runtime/src/main/java/io/quarkus/amazon/lambda/http/graal/LambdaContainerHandlerSubstitution.java
+++ b/extensions/amazon-lambda-rest/runtime/src/main/java/io/quarkus/amazon/lambda/http/graal/LambdaContainerHandlerSubstitution.java
@@ -5,7 +5,7 @@
 import com.oracle.svm.core.annotate.TargetClass;
 
 @TargetClass(LambdaContainerHandler.class)
-public class LambdaContainerHandlerSubstitution {
+public final class LambdaContainerHandlerSubstitution {
 
     // afterburner does not work in native mode, so let's ensure it's never registered
     @Substitute