diff --git a/pkgs/selfprivacy-graphql-api/default.nix b/pkgs/selfprivacy-graphql-api/default.nix
index 9a5c9c7..733063e 100644
--- a/pkgs/selfprivacy-graphql-api/default.nix
+++ b/pkgs/selfprivacy-graphql-api/default.nix
@@ -29,7 +29,7 @@ let
       src = builtins.fetchGit {
         url = "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git";
         rev = "4e7261c9c41b2d389a5825c3d0a73f141b597d3e";
-        fer = "fix/dkim_parser"
+        ref = "fix/dkim_parser"
       };
       propagatedBuildInputs = [
         setuptools