diff --git a/.hgtags b/.hgtags
index 9a6bfd0ae2..db6313d1fb 100644
--- a/.hgtags
+++ b/.hgtags
@@ -14,3 +14,4 @@ bba96254d411014f5b3d66d0001f85bf5943c128 5.8.0
 e429dd2ee74cf18ce6014f3bccac8dc57f2e8952 6.0.0
 01bd2bee97695ffddfeb6f5bd7dff2eb681bc9e3 6.2.0
 74e65a69ab35063d2857d0793660521e43cd94f9 6.4.0
+751b430d94edc4021de87a229e50607ee5bc93a5 6.6.0