diff --git a/.hgtags b/.hgtags
index 4edf641a28..ad680062d2 100644
--- a/.hgtags
+++ b/.hgtags
@@ -25,3 +25,4 @@ ef5bc23acec6b070d72acd94a55539969f114699 5.8.0
 e5bea2a22f5042af86510ab283ef7f6a30276bfd 6.0.0
 6cf0c4d8f64ccaedf402800b446718200d74bbcb 6.2.0
 2406bcb73d0867cb64318cb3917d421ae50858a5 6.4.0
+e245f55d75a981d8b7968be54c9faeaa97c61e22 6.6.0