diff --git a/.hgtags b/.hgtags
index 3bf2f56d7d..6bf0965304 100644
--- a/.hgtags
+++ b/.hgtags
@@ -19,3 +19,4 @@ f0209c41aa97aaf6a1c8da050e47f24ad289aa38 5.8.0
 6f70ee75254fa62addab73552b06b39a2e151e66 6.0.0
 6311d85f112ab42e976db5964c3b8a88f71c609d 6.2.0
 df757189f2c2803cbd60aa4646ec073712ad2a72 6.4.0
+a10a03c01c293c3d60338c0cdf255e645ae582bc 6.6.0