diff --git a/Cargo.toml b/Cargo.toml
index b733a4a96..f8bdb610d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "discv5"
 authors = ["Age Manning <Age@AgeManning.com>"]
 edition = "2018"
-version = "0.3.1"
+version = "0.4.0"
 description = "Implementation of the p2p discv5 discovery protocol"
 license = "Apache-2.0"
 repository = "https://github.com/sigp/discv5"