diff --git a/.hgtags b/.hgtags
index 58e35ca..04a512b 100644
--- a/.hgtags
+++ b/.hgtags
@@ -431,3 +431,4 @@
 28b3e17ca7eba1e6a0891afde0e4bc5bcc99c861 release-1.15.3
 49d49835653857daa418e68d6cbfed4958c78fca release-1.15.4
 f062e43d74fc2578bb100a9e82a953efa1eb9e4e release-1.15.5
+2351853ce6867b6166823bdf94333c0a76633c0a release-1.15.6