diff --git a/.hgtags b/.hgtags
index 4fbc0ae873..5dce485c3f 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1,2 +1,3 @@
 ddc66878ffe6c88422b1d86f2e869ee91f416950 6.2.0
 42b6319f8c16dff95f734a6f8817160b210812c5 6.4.0
+687c9ad7a05f7a4ecbc37ec9d6f02b3269112d1b 6.6.0