diff --git a/npins/sources.json b/npins/sources.json
index 486bd384..0d200016 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -73,7 +73,8 @@
       "submodules": true,
       "revision": "48a7a51516302e070479156b54d2911ba9fbfce8",
       "url": null,
-      "hash": "07d2mzjnggbxlpqarcj65xdndkqxcab38lkbbqh65cyfqzqahdg0"
+      "hash": "07d2mzjnggbxlpqarcj65xdndkqxcab38lkbbqh65cyfqzqahdg0",
+      "frozen": true
     },
     "flake-compat": {
       "type": "GitRelease",