diff --git a/.hgtags b/.hgtags
index 7b58e90..8195065 100644
--- a/.hgtags
+++ b/.hgtags
@@ -3,3 +3,4 @@
 e30eb411080d33d1ae3f0afc413e1c313279367d rel_2_22_2011_0318
 13ffb99827307f6ff2e72f6104524366f3fc205a rel_2_23_2012_0825
 7ee4fb7777fe053b0bc757b31d6247cb2f82a12b rel_2_23_2014_0820
+59bef85e136af2e493119f989b277db2804073aa rel_2_23_2015_0101