diff --git a/.hgtags b/.hgtags
index 34b2f18af..ef68adcf4 100644
--- a/.hgtags
+++ b/.hgtags
@@ -464,3 +464,4 @@ df34dcc9ac072ffd0945e5a1f3eb7987e8275375 release-1.21.0
 a68ac0677f8553b1f84d357bc9da114731ab5f47 release-1.21.1
 bfbc52374adcbf2f9060afd62de940f6fab3bba5 release-1.21.2
 2217a9c1d0b86026f22700b3c089545db1964f55 release-1.21.3
+39be8a682c58308d9399cddd57e37f9fdb7bdf3e release-1.21.4