1 files changed, 2 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index de2a784..af30616 100644
--- a/Makefile
+++ b/Makefile
@@ -9,10 +9,11 @@ all: $(MANPAGES) $(COMPLETIONS)
 
 check:
 	./tests/email-print-mime-structure.sh
+	mypy --strict ./email-print-mime-structure
 
 clean:
 	rm -f $(MANPAGES)
-	rm -rf completions
+	rm -rf completions .mypy_cache
 
 %.1: %.1.pod
 	pod2man --section=1 --date="Debian Project" --center="User Commands" \