diff --git a/shell.nix b/shell.nix
index c02c51c19..58494040a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -9,7 +9,7 @@ let
 
   haskellPackages = pkgs.haskellPackages;
 
-  oauth2Flake = (builtins.getFlake "git+https://gitlab.uniworx.de/mosbach/oauth2-mock-server/?rev=6fc2d621573e048b7ce2dabfc4887c7876055f8d&ref=user-queries").packages.x86_64-linux;
+  oauth2Flake = (builtins.getFlake "git+https://gitlab.uniworx.de/mosbach/oauth2-mock-server/?rev=d47908b4f7883b4b485abf1ee06645495ccdc7b3&ref=user-queries").packages.x86_64-linux;
 
   oauth2MockServer = oauth2Flake.default;
   mkOauth2DB = oauth2Flake.mkOauth2DB;