diff --git a/.hgtags b/.hgtags
index 1c4d6a9752..fbcf1e8a4f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -26,3 +26,4 @@ ff768ce50f0a58c0b69114b462adbfb02552fb30 5.8.0
 0b13983198f6428d352f97a1a8ff31b3b5755738 6.0.0
 079cdd1a2a4df9a1f14213f7a671432d8fce5db2 6.2.0
 cc73042b54865187542ac5366b9d8a8337299179 6.4.0
+8b6c7fe8a6703d66e9ef4ad7459149b040b484da 6.6.0