diff --git a/nginx.conf.tmpl b/nginx.conf.tmpl
index 8498935..545a17a 100644
--- a/nginx.conf.tmpl
+++ b/nginx.conf.tmpl
@@ -1,22 +1,26 @@
+upstream collabora-upstream {
+    server app:9980;
+}
+
 server {
     listen 80;
     server_name {{ env "DOMAIN" }};
 
     # static files
     location ^~ /loleaflet {
-        proxy_pass http://app:9980;
+        proxy_pass http://collabora-upstream;
         proxy_set_header Host $http_host;
     }
 
     # WOPI discovery URL
     location ^~ /hosting/discovery {
-        proxy_pass http://app:9980;
+        proxy_pass http://collabora-upstream;
         proxy_set_header Host $http_host;
     }
 
     # Main websocket
     location ~ /lool/(.*)/ws$ {
-        proxy_pass http://app:9980;
+        proxy_pass http://collabora-upstream;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
         proxy_set_header Host $http_host;
@@ -26,7 +30,7 @@ server {
     # Admin Console websocket
     location ^~ /lool/adminws {
     proxy_buffering off;
-        proxy_pass http://app:9980;
+        proxy_pass http://collabora-upstream;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";
         proxy_set_header Host $http_host;
@@ -35,7 +39,7 @@ server {
 
     # download, presentation and image upload
     location ~ /lool {
-        proxy_pass https://app:9980;
+        proxy_pass https://collabora-upstream;
         proxy_set_header Host $http_host;
     }
 }