diff --git a/mxcube3/server.py b/mxcube3/server.py
index d167526ab..0d6b61ffd 100644
--- a/mxcube3/server.py
+++ b/mxcube3/server.py
@@ -203,7 +203,7 @@ def run(cfg):
 
         if ssl_context:
             Server.flask_socketio.run(
-                Server.flask, ssl_context=ssl_context, host="0.0.0.0", port=8081
+                Server.flask, ssl_context=ssl_context, host="0.0.0.0", port=8888
             )
         else:
-            Server.flask_socketio.run(Server.flask, host="0.0.0.0", port=8081)
+            Server.flask_socketio.run(Server.flask, host="0.0.0.0", port=8888)
diff --git a/ui/cypress.config.js b/ui/cypress.config.js
index 94fea279a..85728ff2a 100644
--- a/ui/cypress.config.js
+++ b/ui/cypress.config.js
@@ -2,7 +2,7 @@ const { defineConfig } = require('cypress');
 
 module.exports = defineConfig({
   e2e: {
-    baseUrl: 'http://localhost:8081',
+    baseUrl: 'http://localhost:8888',
     supportFile: 'cypress/support.js',
     screenshotsFolder: 'cypress/debug',
   },
diff --git a/ui/src/setupProxy.js b/ui/src/setupProxy.js
index 1a1df84e1..fb314ebb6 100644
--- a/ui/src/setupProxy.js
+++ b/ui/src/setupProxy.js
@@ -4,14 +4,14 @@ module.exports = function (app) {
   app.use(
     '/mxcube/api',
     createProxyMiddleware({
-      target: 'http://127.0.0.1:8081',
+      target: 'http://127.0.0.1:8888',
       ws: false,
     }),
   );
   app.use(
     '/socket.io/*',
     createProxyMiddleware({
-      target: 'http://127.0.0.1:8081',
+      target: 'http://127.0.0.1:8888',
       ws: false,
     }),
   );