diff --git a/doc/Makefile b/doc/Makefile
index e1433c3b..b1fcb6c4 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -41,6 +41,7 @@ api:
 
 html: api
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(DEST)/html
+	cp source/plots $(DEST)/html -r
 	@echo
 	@echo "Build finished. The HTML pages are in build/html."