diff --git a/app/index.html b/app/index.html
index fe9ad7081..48d3c440a 100644
--- a/app/index.html
+++ b/app/index.html
@@ -12,7 +12,7 @@
     <script>
       if (window.origin == 'file://') {
         // we are loading the app from a local file as in docker extension
-        document.getElementById('base').href = 'http://localhost:9000/';
+        document.getElementById('base').href = 'http://localhost:49000/';
 
         window.ddExtension = true;
       } else {
diff --git a/build/docker-extension/docker-compose.yml b/build/docker-extension/docker-compose.yml
index 01e315a0c..7845c4be4 100644
--- a/build/docker-extension/docker-compose.yml
+++ b/build/docker-extension/docker-compose.yml
@@ -13,7 +13,7 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - portainer_data:/data
     ports:
-      - 127.0.0.1:9000:9000
-      - 127.0.0.1:9443:9443
+      - 127.0.0.1:49000:9000
+      - 127.0.0.1:49443:9443
 volumes:
   portainer_data: