diff --git a/.hgtags b/.hgtags
index d0efbe013c..347fbd1246 100644
--- a/.hgtags
+++ b/.hgtags
@@ -14,3 +14,4 @@ a7a5871827600c18fa9af7f2e3c3d70f13d4b9d5 5.6.0
 6a8087b47ac508e1f961c376ecd80bf31e01fec3 5.8.0
 b46666a8143fc95d932c987162cbc37480e4f722 6.0.0
 82ebdbf7e7d73d34be3dc79de6c9933a232babc4 6.2.0
+194a54ed8d9f6e2e5b5105926e9605ae6a9e2a6b 6.4.0