diff --git a/images/5.5/alpine/Dockerfile b/images/5.5/alpine/Dockerfile
index e44cb4a..03fb2d9 100644
--- a/images/5.5/alpine/Dockerfile
+++ b/images/5.5/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:alpine
+FROM nginx:1.23.1-alpine
 
 LABEL maintainer="Monogramm maintainers <opensource at monogramm dot io>"