diff --git a/Dockerfile b/Dockerfile
index 8fc758c..9f81568 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Base image containing dependencies used in builder and final image
-FROM ghcr.io/swissgrc/azure-pipelines-openjdk:17.0.12.0 AS base
+FROM ghcr.io/swissgrc/azure-pipelines-openjdk:21.0.4.0 AS base
 
 
 # Builder image