diff --git a/Makefile b/Makefile
index 2157927..969a561 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+default:
+
 .PHONY: clean
 clean:
 	rm -f revealjs/*/index.html revealjs/*/index.pdf */*/handout.pdf