diff --git a/Makefile b/Makefile
index 52859c7..33931ae 100644
--- a/Makefile
+++ b/Makefile
@@ -15,4 +15,4 @@ release/mindfulness_the_game.org : mindfulness_the_game.md
 	       mindfulness_the_game.md
 
 clean:
-	rm *.pdf
+	rm -r release/*