diff --git a/.hgtags b/.hgtags
index 7697444a1d..a5fbed8b8f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,3 +1,4 @@
 e2d7e4135cc43091843e096a227cb69ded3b425a 6.0.0
 e86dc3d9aaf74d02f4d76b7b39be6cccc45df90a 6.2.0
 e669817bef263fe9cfc7b9d065f2fd6464c33825 6.4.0
+3c296d4df695e3b1b0e8a13d54e767db5b0b6aec 6.6.0