diff --git a/.hgtags b/.hgtags
index 5ba33858d9..729da0a9d2 100644
--- a/.hgtags
+++ b/.hgtags
@@ -7,3 +7,4 @@ cd43d73b08c73a75fecae0b59e5da96a89d68498 2.8.0
 59d25a92cc7e19b50f6a11181bcf02b78dc4c09a 3.6.0
 bbdb8fc7bf4aea317d452b38798f2d7d915e5a75 3.8.0
 ad55847e968de20322cc71d504e48f769aa22baf 4.0.0
+173cf80a9a9df5f685c12d2acfa0faddacc94222 4.2.0