diff --git a/.hgtags b/.hgtags
index c9777eb601..187dfe94db 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ b05d84f765a67911944adce3ac14745fce028175 5.0.0
 c994d5caf96e9febbdb906400d75ee32a0832125 6.0.0
 292c9f8616be7cb1d68fd7fcefa2e653e11b238d 6.2.0
 c18743a20433628eae3b238b640be56388d2db0f 6.4.0
+12af663c366799707478a85f486358d70f5ebc1f 6.6.0