diff --git a/Makerules b/Makerules
index c67f62aa3432a9557edd256de219977632dcc0ba..ed3318593856dafeb72ce9ba10e1b7cde4867aaf 100644
--- a/Makerules
+++ b/Makerules
@@ -8,6 +8,7 @@ all: $(SLIDES)
 clean::
 	rm -f *.{aux,log,nav,out,snm,toc,vrb}
 	rm -f *.pdf
+	rm -rf __pycache__
 
 upload::
 	rs $(SLIDES) jw:www/static/vyuka/1920/p1m/