diff --git a/clean.sh b/clean.sh
index 780d6e3..437d6e1 100755
--- a/clean.sh
+++ b/clean.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
+set -e
 isort --profile black *.py lib/*.py
 black -l 80 *.py lib/*.py
 flynt *.py lib/*.py
-
+mypy main.py