diff --git a/.hgtags b/.hgtags
index 0773bb8e15..16e0904e04 100644
--- a/.hgtags
+++ b/.hgtags
@@ -26,3 +26,4 @@ a19d4f68a99f24f220200eef7949504a3849bfbb 5.0.0
 2d9779c9eb069dc9e840690bd9c7fa35f5a6bd54 6.0.0
 2e909dd06ecf55658775bb99363ef5c43f94ee92 6.2.0
 24412704a875390185f4ded6021ff423254664c7 6.4.0
+cbc53976a125baf47f23ae0c107f253340ea08cf 6.6.0