diff --git a/.hgtags b/.hgtags
index 5861099f84..299a79c9ba 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ c68f2f042bdc6a7c71a4ba7085584971675b8a1b 5.4.0
 509835497195f0c3796e6d4201a4f8428c716ba5 5.8.0
 a0bda64f7ba91446ec0a4796348eb38b7c0e462c 6.0.0
 506725ce831f05246ffda883dac423c9d4a99e0a 6.2.0
+64995cef1b85edc1e5076ac2c32d32e4387992c0 6.4.0