diff --git a/.hgtags b/.hgtags
index 57e8368e05..1edaf46881 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ df3887556a10a55d4d069fc55b92702a9c8b73f2 5.6.0
 0204bca11c337a1dbb8bff6f8c01f87e9c2b5759 6.0.0
 9351a0c21322a70fb364bcab6268fe790a4bf311 6.2.0
 de7edfcaf0571322c1e14d8229900bd3d9aeaeb0 6.4.0
+912963a90d79f68bd1e461a77cb5236217fe9a50 6.6.0