diff --git a/roles/munin_server/tasks/main.yml b/roles/munin_server/tasks/main.yml
index b5464bd..90bf2f6 100644
--- a/roles/munin_server/tasks/main.yml
+++ b/roles/munin_server/tasks/main.yml
@@ -40,8 +40,8 @@
       Requires=munin-graph.socket
 
       [Service]
-      User=munin
-      Group=munin
+      User=www-data
+      Group=www-data
       Environment="TZ=Europe/Paris"
       ExecStart=/usr/lib/munin/cgi/munin-cgi-graph
       StandardInput=socket