diff --git a/shell.nix b/shell.nix
index 10e427a..f6f7a2c 100644
--- a/shell.nix
+++ b/shell.nix
@@ -7,6 +7,7 @@ mkShell {
     python3.pkgs.mypy
     python3.pkgs.black
     python3.pkgs.flake8
+    ruff
     shellcheck
     direnv
   ];