diff --git a/Makefile b/Makefile
index d0ace2a1ccb..63872a1721c 100644
--- a/Makefile
+++ b/Makefile
@@ -67,4 +67,4 @@ test-examples:
 # Check that docs can build
 
 docs:
-	cd docs && make html SPHINXOPTS="-W"
+	cd docs && make html SPHINXOPTS="-W -j 4"