diff --git a/.hgtags b/.hgtags
index 6592a90..47be416 100644
--- a/.hgtags
+++ b/.hgtags
@@ -71,3 +71,4 @@
 e83a60c69d53f5551a306e77a6d38e9b11485496 v3.0rc3
 bc1ce368986e45b1faf96f93995df46bcd75e7b8 v3.1a1
 ee430e5075db2adf8124e6b94916a89ca41d3171 v3.1a2
+b63020797f9678adaf4d2c3e26574a9eef2ef028 v3.1b1