diff --git a/20/Dockerfile b/20/Dockerfile
index 31462e0..a40d3a4 100644
--- a/20/Dockerfile
+++ b/20/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:iron-alpine
+FROM node:20.15.1-alpine3.20
 LABEL maintainer "Tim Brust <github@timbrust.de>"
 
 ARG REFRESHED_AT