diff --git a/.hgtags b/.hgtags
index 95167c0a..9cfac5aa 100644
--- a/.hgtags
+++ b/.hgtags
@@ -5,3 +5,4 @@ d3173a049103c79026ace011c84cb571005c944f 1.3.1
 fdfe57118031f51f776ae44bb75ff94ed5955779 1.4.0
 84d1a51d1e40bcf39e683881394a78ae55cdf0dd 1.4.1
 c71c97e579b3e30714aa1d5202d62925a143068d 1.5.0
+1a9469387c3889bff4addac5fd1cbc6333a40995 1.5.1