diff --git a/Makefile b/Makefile
index a2b30bc..c51f040 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ clean:
 prepare:
 	pip install mkdocs mkdocs-windmill-dark
 unprepare:
-	pip uninstall mkdocs mkdocs-windmill-dark
+	pip uninstall -y mkdocs mkdocs-windmill-dark
 serve:
 	mkdocs serve