diff --git a/docs/Makefile b/docs/Makefile
index c5d2df4..8267fd8 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -52,7 +52,9 @@ dist: html
 	cp -al build/html .
 	@echo "Build finished.  Final docs are in html/"
 
-html: api
+html: core api
+
+core:
 	mkdir -p build/html build/doctrees
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) build/html
 	@echo