diff --git a/s2i/k8s-monitoring/Dockerfile.front b/s2i/k8s-monitoring/Dockerfile.front
old mode 100755
new mode 100644
index 8c4f247..b7bb824
--- a/s2i/k8s-monitoring/Dockerfile.front
+++ b/s2i/k8s-monitoring/Dockerfile.front
@@ -1,4 +1,4 @@
-FROM nginx
+FROM nginx:1-bullseye
 
 EXPOSE 80