diff --git a/Contributions.md b/Contributions.md
index 3a58403..ad8bdcf 100644
--- a/Contributions.md
+++ b/Contributions.md
@@ -34,7 +34,7 @@ isort --check --diff .
 ```
 No error should be reported!
 
-### Run "mypy"
+#### Run "mypy"
 
 ```
 python -c 'import importlib.util, subprocess, sys; importlib.util.find_spec("mypy") and sys.exit(subprocess.run(["mypy", "."]).returncode)'