diff --git a/.hgtags b/.hgtags
index 8e31fc1a85..4b55090bc3 100644
--- a/.hgtags
+++ b/.hgtags
@@ -24,3 +24,4 @@ c71cbf353d3e9ddd3b354367d50f58bdaac66af1 5.2.0
 abf29d2d8ecf3ac2d2b4639af36d16881fdae55b 6.0.0
 3e14e993af748f1721520bb8dc83620ade5c7e91 6.2.0
 bff5ab5cf6dc21a96258cfc8582a387107c248fc 6.4.0
+1b739ed53b00a13512b59cd08c8fc66fdec62402 6.6.0