diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index a3909e4..cbfdcd7 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,18 +8,23 @@ updates:
   directory: "/"
   schedule:
     interval: daily
-  target-branch: java17
 - package-ecosystem: docker
   directory: "/"
   schedule:
     interval: daily
+  target-branch: java8
 - package-ecosystem: docker
   directory: "/"
   schedule:
     interval: daily
-  target-branch: java8
+  target-branch: java11
 - package-ecosystem: docker
   directory: "/"
   schedule:
     interval: daily
-  target-branch: java11
+  target-branch: java17
+- package-ecosystem: docker
+  directory: "/"
+  schedule:
+    interval: daily
+  target-branch: java21
diff --git a/Dockerfile b/Dockerfile
index 7612a3a..b86d8db 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM quay.io/evryfs/base-ubuntu:jammy-20231128
 LABEL maintainer "David J. M. Karlsen <david@davidkarlsen.com>"
-ARG JDK_VERSION=11.0.17+8
-ARG DOWNLOAD_URL=https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.17%2B8/OpenJDK11U-jdk_x64_linux_hotspot_11.0.17_8.tar.gz
+ARG JDK_VERSION=11.0.23+9
+ARG DOWNLOAD_URL=https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.23%2B9/OpenJDK11U-jdk_x64_linux_hotspot_11.0.23_9.tar.gz
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN	mkdir -p /usr/lib/jvm && \
 	curl -Ls ${DOWNLOAD_URL} | tar xzv -C /usr/lib/jvm && \