diff --git a/volumes/conf.d/etherpad.zinomedia.de.conf b/volumes/conf.d/etherpad.zinomedia.de.conf
index c29e2ea..bc08317 100644
--- a/volumes/conf.d/etherpad.zinomedia.de.conf
+++ b/volumes/conf.d/etherpad.zinomedia.de.conf
@@ -4,8 +4,8 @@ map $http_upgrade $connection_upgrade {
 }
 
 server {
-    listen 443 ssl http2;
-    listen [::]:443 ssl http2;
+    listen 443 ssl;
+    listen [::]:443 ssl;
     server_name etherpad.zinomedia.de;
 
     access_log off;