diff --git a/pkgs/development/php-packages/phpstan/default.nix b/pkgs/development/php-packages/phpstan/default.nix
index 06636953beea..5701261ea371 100644
--- a/pkgs/development/php-packages/phpstan/default.nix
+++ b/pkgs/development/php-packages/phpstan/default.nix
@@ -11,11 +11,11 @@ php.buildComposerProject2 (finalAttrs: {
   src = fetchFromGitHub {
     owner = "phpstan";
     repo = "phpstan-src";
-    rev = finalAttrs.version;
+    rev = "refs/tags/${finalAttrs.version}";
     hash = "sha256-wF2OqJ0kg+wEjSq8mAyF5em5RAqjyXqKFkdAjxOrePM=";
   };
 
-  vendorHash = "sha256-NLaOxWMhTViv7OfXE5b7NTeL/jD7Fvbx/1ihGlRJCws=";
+  vendorHash = "sha256-IHnPhV4H8xkonjllOGMmB0zibaGapc8XBrg4km/jKb4=";
   composerStrictValidation = false;
 
   meta = {