diff --git a/volumes/conf.d/code.zinomedia.de.conf b/volumes/conf.d/code.zinomedia.de.conf
index 4bf3512..1cfa9a3 100644
--- a/volumes/conf.d/code.zinomedia.de.conf
+++ b/volumes/conf.d/code.zinomedia.de.conf
@@ -30,7 +30,7 @@ server {
         #proxy_pass http://vouch:9090/validate;
 
         resolver 127.0.0.11;
-        set $upstream "http://vouch:9090/validate";
+        set $upstream "vouch:9090/validate";
         proxy_pass $upstream;
 
         # be sure to pass the original host header