diff --git a/.hgtags b/.hgtags
index fbed4c4140..c713b3e29c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -61,3 +61,4 @@ d44f290e81df5f78f0e3545742e3c4ff5415b0a7 4.2.0-rc3
 af176624c3ae86141a4ad8617b5ec2a834a6c626 RELEASE-4.2.0
 b6f071324f5ed076bfd28c71b51521cdd38639ab 4.2.1-rc1
 bfa4df1dbe1dac55428437184f811d174d806755 4.2.1-rc2
+25b021aa35ebdb08b53fd7acf36dfed184989933 RELEASE-4.2.1