diff --git a/.hgtags b/.hgtags
index 03c0549683..d43c38112e 100644
--- a/.hgtags
+++ b/.hgtags
@@ -17,3 +17,4 @@ a6e59e1c9b7981c3ce55f2706fffc4d6c4ecb2f2 5.4.0
 19d51ff65558dd670c32a1ce0b50b26720858330 6.0.0
 9efcffd3971ceb56b7be36211f72a8ea2ec980d4 6.2.0
 f0f929561815e17789aafb491e6f34557e5d39d6 6.4.0
+2c0f8889dc6f4fbe9b28067e2e9f995e44f3323b 6.6.0