diff --git a/dot.hgrc b/dot.hgrc
index 8da7e1c..2cccc32 100644
--- a/dot.hgrc
+++ b/dot.hgrc
@@ -6,3 +6,4 @@ cacerts = /etc/ssl/certs/ca-certificates.crt
 
 [extensions]
 patchbomb =
+purge =