diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -147,3 +147,4 @@ 299546f84e68dbb9bd026f0f3a974ce4bdb93686
 ccd436f7db6d5d7b9af89715179b911d031d44f1 3.9.1
 149433e68974eb5c63ccb03f794d8b57339a80c4 3.9.2
 438173c415874f6ac653efc1099dec9c9150e90f 4.0-rc
+eab27446995210c334c3d06f1a659e3b9b5da769 4.0