diff --git a/shell.nix b/shell.nix
index 61f9807..ab4c88b 100644
--- a/shell.nix
+++ b/shell.nix
@@ -9,6 +9,7 @@ mkShell rec {
   packages = [
     cargo-audit
     cargo-edit
+    cargo-expand
     cargo-insta
     cargo-make
     cargo-outdated