diff --git a/.hgtags b/.hgtags
index 93bf80a727..5b84f521aa 100644
--- a/.hgtags
+++ b/.hgtags
@@ -12,3 +12,4 @@ d8f30d94549ac7e93606911e05435b481ebec0b6 5.8.0
 be422ebc8cc213ba0808ea54d33b59a481abd4bc 6.0.0
 f5e24c9e43a6df877f922cb90c855ab6b298221f 6.2.0
 efafada3566af873952c6db04c2e262499255799 6.4.0
+3baea9efc6977397c303836084919917a6ecebf3 6.6.0