diff --git a/.hgtags b/.hgtags
index f4cf8f87c5..52ce8f5992 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1 +1,2 @@
 8ea2a3517b0241986ef78939a267036299730d92 6.4.0
+9dbddc471c36561cdb10e924d96256590864da73 6.6.0