diff --git a/Makefile b/Makefile
index 74dd5e5..eeaed44 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,16 @@ clean:
 
 sphinx:
 	$(MAKE) singlehtml epub latexpdf
+	rm build/singlehtml/_static/base-stemmer.js
+	rm build/singlehtml/_static/basic.css
+	rm build/singlehtml/_static/css/badge_only.css
+	rm build/singlehtml/_static/epub_cover.png
+	rm build/singlehtml/_static/german-stemmer.js
+	rm build/singlehtml/_static/jquery-3.5.1.js
+	rm build/singlehtml/_static/language_data.js
+	rm build/singlehtml/_static/searchtools.js
+	rm build/singlehtml/_static/underscore-1.13.1.js
+	rm build/singlehtml/_static/wtf_coop_header.png
 
 bundle: sphinx
 	-mkdir bundle