diff --git a/.hgtags b/.hgtags
index d532d2c720..8ed6a77452 100644
--- a/.hgtags
+++ b/.hgtags
@@ -2,3 +2,4 @@
 8ca8057e893a91132d0cd825f4d657f33d7ea0e7 6.0.0
 42401c72c3a82685174dba5a81aaebaa4f624fb1 6.2.0
 813ad0081e08f2bc3bd5625b9e78a4e08f5c2151 6.4.0
+279eb9b4bf692ed19998700b08ce14fa33d925af 6.6.0