diff --git a/.hgtags b/.hgtags
index 29884c0999..5dc25ff535 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ d9b57e6f051b3cb02b50c296901d3541f405535a 5.8.0
 006cf7af618bbbba88ec3a16b5f04af8043abea7 6.0.0
 4f539c7e90c162e5ec2a8c6318184c40b8c6509e 6.2.0
 ff626266302d406e79a5b57c6707435d4c6936d4 6.4.0
+23ffe1932ef6be97fb44989eacf5bd5847a640b4 6.6.0