diff --git a/Makefile b/Makefile
index 83e753c843aed469c1b57a189fdcfdc6d6da8026..17275db0d5eba669f7f0db33e26ab26dbb4a49d6 100644
--- a/Makefile
+++ b/Makefile
@@ -27,6 +27,7 @@ debug-webui:
 clean-local-bugs:
 	git for-each-ref refs/bugs/ | cut -f 2 | xargs -r -n 1 git update-ref -d
 	git for-each-ref refs/remotes/origin/bugs/ | cut -f 2 | xargs -r -n 1 git update-ref -d
+	rm -f .git/git-bug/cache
 
 clean-remote-bugs:
 	git ls-remote origin "refs/bugs/*" | cut -f 2 | xargs -r git push origin -d