diff --git a/manifest.json b/manifest.json
index e109b849..11489478 100644
--- a/manifest.json
+++ b/manifest.json
@@ -119,7 +119,7 @@
   "applications": {
     "gecko": {
       "id": "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}",
-      "strict_min_version": "53"
+      "strict_min_version": "53.0"
     }
   }
 }