diff --git a/pyproject.toml b/pyproject.toml
index 90a5c124..fa9e073c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -141,7 +141,7 @@ dev = [
     "black==25.12.0",
     "isort==7.0.0",
     "mypy==1.19.1",
-    "mypy-protobuf==3.6.0",
+    "mypy-protobuf==4.0.0",
     "PyGithub==2.6.0",
     "bump-my-version==1.2.4",
     # type stubs for mypy