diff --git a/nix/sources.json b/nix/sources.json
index 3201f82..2bfbbea 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -54,10 +54,10 @@
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5de44c15758465f8ddf84d541ba300b48e56eda4",
-        "sha256": "05darjv3zc5lfqx9ck7by6p90xgbgs1ni6193pw5zvi7xp2qlg4x",
+        "rev": "1f91fd1040667e9265a760b0347f8bc416249da7",
+        "sha256": "1lcfcwgal9fpaiq71981abyzz160r6nx1y4pyy1dnvaf951xkdcj",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/5de44c15758465f8ddf84d541ba300b48e56eda4.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/1f91fd1040667e9265a760b0347f8bc416249da7.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }