diff --git a/browser-extensions/chrome/manifest.json b/browser-extensions/chrome/manifest.json
index 50f9dfd5..1cbb3c58 100644
--- a/browser-extensions/chrome/manifest.json
+++ b/browser-extensions/chrome/manifest.json
@@ -54,7 +54,6 @@
         "js/lib/i18n.js",
         "js/lib/challenges.js",
         "js/lib/challenges_ui.js",
-        "js/lib/cache.js",
         "js/content-scripts/content-script-parkrunner.js"
       ],
       "css": [