diff --git a/drupal-cms/flake.nix b/drupal-cms/flake.nix
index dcb30dd..a336345 100644
--- a/drupal-cms/flake.nix
+++ b/drupal-cms/flake.nix
@@ -17,6 +17,7 @@
               memory_limit = 512M
             '';
           })
+          phpPackages.composer
 
           sqlite
         ];