diff --git a/.hgtags b/.hgtags
index 2954012..909da74 100644
--- a/.hgtags
+++ b/.hgtags
@@ -382,3 +382,4 @@
 860cfbcc4606ee36d898a9cd0c5ae8858db984d6 release-1.7.10
 2b3b737b5456c05cd63d3d834f4fb4d3776953d0 release-1.7.11
 3ef00a71f56420a9c3e9cec311c9a2109a015d67 release-1.7.12
+53d850fe292f157d2fb999c52788ec1dc53c91ed release-1.9.0