diff --git a/.hgtags b/.hgtags
index 4ebeabb894..61bef834b8 100644
--- a/.hgtags
+++ b/.hgtags
@@ -15,3 +15,4 @@ ada2dfbdedcf8429307af83219b3c849ec715b4d 4.4.0
 8aacfc0b9c024af4f19e92de6d0e4424fea8893f 6.0.0
 502e072321dcee4c3bb424c13acc870a35ae8ed8 6.2.0
 d8e3931f9b48194071695e99d1b2fca37d80c8ad 6.4.0
+ac6142e11765ea1513bf6ffce71592adb4f4f2f7 6.6.0