diff --git a/.hgtags b/.hgtags
index 7e8be545f7..438e638a96 100644
--- a/.hgtags
+++ b/.hgtags
@@ -18,3 +18,4 @@ f2a86e21569621ea6800408e9273c18b9c2fe7ee 5.4.0
 85c13d9125115340cd4c0942b92ecb3fc1d9252f 5.8.0
 8dd2b05e4073cb3eff71912aa22d4beecf42ab1f 6.0.0
 a662f66eaf966a24fab179374549ffb25e2e1535 6.2.0
+9eaa8563e54971158facbf02fbf9ad048fbee42f 6.4.0