diff --git a/blueprint/lib/updateAdminCacheReminder.sh b/blueprint/lib/updateAdminCacheReminder.sh
index 6aedd4d..2df9a4d 100644
--- a/blueprint/lib/updateAdminCacheReminder.sh
+++ b/blueprint/lib/updateAdminCacheReminder.sh
@@ -5,9 +5,9 @@ updateCacheReminder() {
   # Overwrite previous adminCacheReminderHider with the default one.
   oldClassName=$(cat .blueprint/data/internal/db/randomclassname);
   newClassName=$RANDOM;
-  mv public/assets/extensions/blueprint/misc/cacheOverlay-$oldClassName public/assets/extensions/blueprint/misc/cacheOverlay-$newClassName;
+  mv public/assets/extensions/blueprint/misc/cacheOverlay-$oldClassName.css public/assets/extensions/blueprint/misc/cacheOverlay-$newClassName.css;
   sed -i "s~cacheOverlay-$oldClassName~cacheOverlay-$newClassName~g" public/assets/extensions/blueprint/blueprint.style.css;
   sed -i "s~cacheOverlay-$oldClassName~cacheOverlay-$newClassName~g" resources/views/layouts/admin.blade.php;
-  sed -i "s~cacheOverlay-$oldClassName~cacheOverlay-$newClassName~g" public/assets/extensions/blueprint/misc/cacheOverlay-$newClassName;
+  sed -i "s~cacheOverlay-$oldClassName~cacheOverlay-$newClassName~g" public/assets/extensions/blueprint/misc/cacheOverlay-$newClassName.css;
   echo "$newClassName" > .blueprint/data/internal/db/randomclassname;
 }
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