diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -69,3 +69,5 @@ cf635c823ea059cc3a1581b82d8672e46b682384
 4cca4cc6a0a97f4c4763317184cd41aca4297630 0.3.5
 082c9b8f0f17bd34740eb90c69bdc4c80d4b5b31 0.3.6
 a18445b85d407294da0b7f1d8be3bedef5ffdea6 0.3.7
+43d472db8c82690ec36bdfc26a985eb0ff726788 0.4.0rc1
+8db761c407685e7b08b800c947890035b0d67025 0.4.0rc1