diff --git a/.hgtags b/.hgtags
index 457e7b650f..3467a1e436 100644
--- a/.hgtags
+++ b/.hgtags
@@ -7,3 +7,4 @@ c5757a882fa6b0f30a7bca1a2e232c59dbe8e997 4.8.0
 a767051ad55af5437c1df4473f0d16251941bc79 5.8.0
 2657bcf38993689626952562bc1999027d0262cd 6.0.0
 3ebb517c91bc0b75b347d4e23fc63234aace7b22 6.2.0
+a71b982ae4381f840823a000af60c3c222c957f0 6.4.0