diff --git a/Dockerfile b/Dockerfile
index 9106ec1..e6bd22f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM jenkins/ssh-agent
+FROM jenkins/ssh-agent:latest-jdk21
 
 RUN groupadd -g 281 docker
 RUN usermod -aG docker jenkins
diff --git a/alpine/Dockerfile b/alpine/Dockerfile
index a00ad4e..fbebb63 100644
--- a/alpine/Dockerfile
+++ b/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM jenkins/ssh-agent:alpine
+FROM jenkins/ssh-agent:alpine-jdk21
 
 RUN addgroup --gid 281 docker
 RUN addgroup jenkins docker