diff --git a/.hgtags b/.hgtags
index 0e03fb25ea..b6616ed2b2 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,4 @@ c86d3fb2b0fd6b49a72f0088dc7163d28ca540ca 5.6.0
 e19efcc939272a4a44289bd8af8e81c00b72917d 6.0.0
 fecc0250e8ec42296cace35dfcc86858ed9bb47d 6.2.0
 de69c196acdb3dd8adc05716353897ce4a9094ce 6.4.0
+f7f9c981125ac2cec0d241c886285f5f30157ab5 6.6.0