diff --git a/.hgtags b/.hgtags
index dd2685927e..5110a59c9c 100644
--- a/.hgtags
+++ b/.hgtags
@@ -3,3 +3,4 @@
 32a0b05096cb83083f5e66d008030a8b1cacfc81 5.8.0
 33f97eb44c2ea967e49411860d2c05c088ab15e0 6.0.0
 3d243f70808b54f1c8cc47452909a50ec092d9a1 6.2.0
+e46199cc2bb7781af4a946f6a676272ce20196b3 6.4.0