diff --git a/apps/electron/package.json b/apps/electron/package.json
index 51d88e3a8..916df7e08 100644
--- a/apps/electron/package.json
+++ b/apps/electron/package.json
@@ -125,6 +125,13 @@
           "**/*",
           "*{.ts}"
         ]
+      },
+      {
+        "from": "../server/src/html/",
+        "to": "extraResources/html/",
+        "filter": [
+          "**/*"
+        ]
       }
     ]
   }
diff --git a/apps/server/src/app.ts b/apps/server/src/app.ts
index 3d2d1d229..29d9d17a6 100644
--- a/apps/server/src/app.ts
+++ b/apps/server/src/app.ts
@@ -117,8 +117,9 @@ app.use(`${prefix}/external`, (req, res) => {
 app.use(`${prefix}/user`, express.static(publicDir.userDir, { etag: false, lastModified: true }));
 
 // Serve legacy timer for old browsers that don't support modern JS
+// dotfiles must be allowed since the install path can contain dot directories (eg AppImage mounts in /tmp/.mount_*)
 app.get(`${prefix}/timer-legacy`, authenticateAndRedirect, (_req, res) => {
-  res.sendFile(srcFiles.timerLegacy);
+  res.sendFile(srcFiles.timerLegacy, { dotfiles: 'allow' });
 });
 
 // Base route for static files