diff --git a/Makefile b/Makefile
index fb56a5c5..c336205b 100644
--- a/Makefile
+++ b/Makefile
@@ -125,6 +125,9 @@ docs:
 docs_doxygen_only:
 	$(Q)$(MAKE) -C docs docs_doxygen_only
 
+docs_external:
+	$(Q)make -C ../libxlsxwriter.github.io release
+
 # Simple minded install.
 install: all
 	$(Q)mkdir -p        $(DESTDIR)$(PREFIX)/include