diff --git a/Dockerfile b/Dockerfile
index 1a9fab7..2a0638c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG BUILDER_BASE_IMAGE=eclipse-temurin:17.0.15_6-jdk-jammy@sha256:d80cf84d4d49682f047cb303a11be1fcc8322b1e4cd7a7c2b17454085c1f2ffb
+ARG BUILDER_BASE_IMAGE=eclipse-temurin:21.0.7_6-jdk-jammy@sha256:5fdd5f11eb03c9c4474de0383d883fc8f1b2dd67f4440f39f7a2595f443569ef
 ARG GEOSERVER_BASE_IMAGE=tomcat:9.0.105-jdk17-temurin-jammy@sha256:c2fcc23dc9579631f7d7063920dab9f53b1a09de947f9f61146a643ab50dc19c
 
 ARG GS_VERSION=2.27.0