diff --git a/.hgtags b/.hgtags
index a9b7d2bf6f..4e9f0ac208 100644
--- a/.hgtags
+++ b/.hgtags
@@ -23,3 +23,4 @@ ef59ca9b0e9559c3e868bf7964c87e7adf66b118 5.2.0
 b6ef4c2e9e0ee2104b5889b8efd6eec5646f1628 5.8.0
 6a47015c7235d06b5b4ddec5ed8cd774d06f6e19 6.0.0
 85884460891fe388a929c01b7cd3d9b40321cfd8 6.2.0
+155323437e7568feef68d76863636e4d10a65689 6.4.0