diff --git a/.hgtags b/.hgtags
index d991bd8243..f4736dd193 100644
--- a/.hgtags
+++ b/.hgtags
@@ -13,3 +13,4 @@ e3bfdd4e6d6137e03c9099e270572dd6d76a7827 3.2.0
 04033be39fd314106aeb444ab08367c5d2567a01 3.4.0
 3062157429796403226f2e46f6365d2298bfba8f 3.6.0
 cde43b11b7441f9f04398a64c58eb616f90fcfec 3.8.0
+effb65954b07f8ea832005cd5940fcf3bc3edcbe 4.0.0