diff --git a/external-proxy/collabora-exposed.yml b/external-proxy/collabora-exposed.yml
index a6bb388..c25f265 100644
--- a/external-proxy/collabora-exposed.yml
+++ b/external-proxy/collabora-exposed.yml
@@ -1,10 +1,6 @@
 ---
 # only expose the ports when you know what you are doing!
 services:
-  collaboration:
-    ports:
-      # expose the wopi server on all interfaces
-      - "0.0.0.0:9300:9300"
   collabora:
     ports:
       # expose the collabora server on all interfaces