diff --git a/.hgtags b/.hgtags
index 5110a59c9c..b9a0beb4c1 100644
--- a/.hgtags
+++ b/.hgtags
@@ -4,3 +4,4 @@
 33f97eb44c2ea967e49411860d2c05c088ab15e0 6.0.0
 3d243f70808b54f1c8cc47452909a50ec092d9a1 6.2.0
 e46199cc2bb7781af4a946f6a676272ce20196b3 6.4.0
+0355bcbb0bf56e0b7b58d0da1bfe0655f447c900 6.6.0