diff --git a/Project.toml b/Project.toml
index 689d4dac4..bd445be6c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Yao"
 uuid = "5872b779-8223-5990-8dd0-5abbb0748c8c"
-version = "0.4.0-DEV"
+version = "0.4.0"
 
 [deps]
 BitBasis = "50ba71b6-fa0f-514d-ae9a-0916efc90dcf"