diff --git a/.hgtags b/.hgtags
index 957d260caa..cc1046c7ef 100644
--- a/.hgtags
+++ b/.hgtags
@@ -17,3 +17,4 @@ e2452d05303463862d2da2b262a0a9624787f41e 5.0.0
 394e3db8573728ed4b4aff1520aeea8ab3f4e063 6.0.0
 f2df468193a63bb6d56083ceb853bb3c390aa7de 6.2.0
 fcecdacba07c2ea68eb54c8e857b4f43f7141ad5 6.4.0
+9ffe7d3e158e5862d04def1538f25bdb2161c236 6.6.0