diff --git a/Dockerfile b/Dockerfile
index cac50e47cc4c5e1dca2f94c1a0703ed0cb366d6f..42198e25d10b4594cd01f3f99fb94a52eea8c13c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,7 @@ FROM ${DEPENDENCY_PROXY}nginxinc/nginx-unprivileged:1.25
 
 # Copy custom conf to write logs into file to persist them
 COPY nginx/nginx.conf /etc/nginx/nginx.conf
-RUN mkdir -p /tmp/log
+RUN mkdir -p /tmp/log && chgrp 0 /tmp/log && chmod g+w /tmp/log
 
 # Copy nginx modified conf with template (cf. "Using environment variables in nginx configuration" in https://hub.docker.com/_/nginx )
 COPY nginx/templates/default.conf.template /etc/nginx/templates/default.conf.template