diff --git a/.hgtags b/.hgtags
index b5ed67e93e..4ebeabb894 100644
--- a/.hgtags
+++ b/.hgtags
@@ -14,3 +14,4 @@ ada2dfbdedcf8429307af83219b3c849ec715b4d 4.4.0
 37d6eae8d20becfab7fb210464db2b0095342fe8 5.8.0
 8aacfc0b9c024af4f19e92de6d0e4424fea8893f 6.0.0
 502e072321dcee4c3bb424c13acc870a35ae8ed8 6.2.0
+d8e3931f9b48194071695e99d1b2fca37d80c8ad 6.4.0