diff --git a/.hgtags b/.hgtags
index d38de19..c5d8b07 100644
--- a/.hgtags
+++ b/.hgtags
@@ -26,3 +26,4 @@ b00a47e867797e7fea156c55341ed439bfa74a42 0.5
 b8b4401fc0deef875c357bafcae73ae82c4f82d0 0.5
 18e839b3bd801793dd58bdf19639c29fc6d123e7 0.5
 b709f9e5341fdaecd7923272dd16107429f6d505 0.5.1
+4cca231c7e1e49b50aab6787215a4731384c1d2a 0.5.1