diff --git a/config.json b/config.json
index 12b282d94fb..4ab18e4cb86 100644
--- a/config.json
+++ b/config.json
@@ -951,7 +951,7 @@
       "slug": "rational-numbers",
       "core": false,
       "unlocked_by": null,
-      "difficulty": 2,
+      "difficulty": 5,
       "topics": [
         "equality",
         "classes",