diff --git a/.hgtags b/.hgtags
index d59b624..b2cc21d 100644
--- a/.hgtags
+++ b/.hgtags
@@ -150,3 +150,4 @@
 1f81c711d2a039e1f93b9b515065a2235372d455 release-0.5.19
 8e8f6082654aedb4438c8fca408cfc316c7c5a2a release-0.5.20
 e9551132f7dd40da5719dd5bcf924c86f1436f85 release-0.5.21
+533a252896c4d1cff1586ae42129d610f7497811 release-0.5.22