diff -rupN --no-dereference Pillow-8.1.1/docs/Makefile Pillow-8.1.1-new/docs/Makefile
--- Pillow-8.1.1/docs/Makefile	2021-03-01 09:24:03.000000000 +0100
+++ Pillow-8.1.1-new/docs/Makefile	2021-03-02 15:10:49.514033779 +0100
@@ -42,7 +42,7 @@ clean:
 	-rm -rf $(BUILDDIR)/*
 
 html:
-	$(SPHINXBUILD) -b html -W --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	$(SPHINXBUILD) -b html --keep-going $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."