diff --git a/packages/ui-default/backendlib/builder.ts b/packages/ui-default/backendlib/builder.ts
index 4dbf1e92..3fcabaf9 100644
--- a/packages/ui-default/backendlib/builder.ts
+++ b/packages/ui-default/backendlib/builder.ts
@@ -52,7 +52,7 @@ const build = async (contents: string) => {
     outdir: tmp,
     splitting: false,
     write: false,
-    target: ['chrome60'],
+    target: ['chrome65'],
     plugins: [
       ...(global.Hydro.ui.esbuildPlugins || []),
       federationPlugin,
diff --git a/packages/ui-default/build/config/webpack.ts b/packages/ui-default/build/config/webpack.ts
index 433afcef..186423f7 100644
--- a/packages/ui-default/build/config/webpack.ts
+++ b/packages/ui-default/build/config/webpack.ts
@@ -222,7 +222,7 @@ export default function (env: { watch?: boolean, production?: boolean, measure?:
         minifyIdentifiers: true,
         treeShaking: true,
         target: [
-          'chrome60',
+          'chrome65',
         ],
         exclude: [/mathmaps/, /\.min\.js$/],
       })],
diff --git a/packages/ui-default/build/main.ts b/packages/ui-default/build/main.ts
index be247fdc..70fdd8d0 100644
--- a/packages/ui-default/build/main.ts
+++ b/packages/ui-default/build/main.ts
@@ -32,6 +32,9 @@ async function runWebpack({
         target: 'http://localhost:2333',
         ws: true,
       },
+      client: {
+        webSocketURL: 'auto://0.0.0.0:0/ws',
+      },
     }, compiler);
     server.start();
     return;