diff --git a/Makefile b/Makefile
index 1755145..a447671 100644
--- a/Makefile
+++ b/Makefile
@@ -2,5 +2,5 @@ all: readme.html
 # Prevent make from looking for a file called 'all'
 .PHONY : all
 
-readme.html: readme.rst
-	rst2html readme.rst > readme.html
+readme.html: readme.rst Makefile
+	rst2html readme.rst readme.html