diff --git a/Dockerfile b/Dockerfile
index d5b75ff80361e2af46d2e8dfb04c6f193a81ec6b..b7233a362d4a9bbc52e1d18cdd0ee1ad76e867d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM ubuntu:20.04
 
 # Global Gradle arguments
-ARG GRADLE_VERSION="8.0"
+ARG GRADLE_VERSION="8.5"
 ARG GRADLE_DIST=bin
 ARG GRADLE_HOME="/gradle"
 ARG GRADLE_PATH="${GRADLE_HOME}/gradle-${GRADLE_VERSION}/bin"
@@ -32,6 +32,7 @@ RUN apt-get -qq update && \
       git-core \
       openjdk-11-jdk \
       openjdk-17-jdk \
+      openjdk-21-jdk \
       libc6-i386 \
       libstdc++6:i386 \
       zlib1g:i386 \