diff --git a/openjdk21-alpine/Dockerfile b/openjdk21-alpine/Dockerfile
index 231ce1d..b98f30d 100644
--- a/openjdk21-alpine/Dockerfile
+++ b/openjdk21-alpine/Dockerfile
@@ -2,7 +2,7 @@ FROM public.ecr.aws/docker/library/node:$NODE_VERSION-alpine
 
 # OpenJDK
 ENV JAVA_HOME="/usr/lib/jvm/default-jvm"
-ENV OPENJDK_VERSION=17
+ENV OPENJDK_VERSION=21
 
 RUN apk update \
       && apk add --no-cache openjdk${OPENJDK_VERSION} \