diff --git a/.hgtags b/.hgtags
index ca0d613..1df44f7 100644
--- a/.hgtags
+++ b/.hgtags
@@ -10,3 +10,4 @@ a9828ad2cef5b6961325c27cf16d4e0122a3d1f5 v0.5.0
 0000000000000000000000000000000000000000 v0.5.0
 0000000000000000000000000000000000000000 v0.5.0
 e03894e9208e3420fad2059e5922bc5cf9e136fc v0.5.0
+615712ac8519e6a89c6d26e1febf168d0dfb50d5 v0.5.1