diff --git a/.hgtags b/.hgtags
index 8432908569..3a3faac086 100644
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ c9c039741d11671b752e24c14333f038246b771e 5.6.0
 168fec4cbfe60387daffbafc8eeea744c8157365 6.0.0
 c89c9a77e0faf8e6bd88b675764298e30025608d 6.2.0
 05157748568608904cd96fefc8d69eb5a47a4d45 6.4.0
+1a95f81c3930d1bfccc3e0d74ed6b58dcedeace5 6.6.0