diff --git a/.hgtags b/.hgtags
index bc91b279bf..b24798422b 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ da18123e3fd5dccc41fb6f0385078c73d2f133ac 5.6.0
 0d35637e6b73934bbc6edd6accabb7bf1841e77c 6.0.0
 04832390b9f8b27fde64024764b61515435c5f31 6.2.0
 b0ceb357f0f05712ec08b62be561e9d4c97fe2b1 6.4.0
+bd637b711ec782a7f0604a4dc073937630afc4ef 6.6.0