diff --git a/Cargo.toml b/Cargo.toml
index 6d4d7c8..5a4caf7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name          = "mongo_driver"
-version       = "0.3.0"
+version       = "0.4.0"
 authors       = ["Thijs Cadier <thijs@appsignal.com>"]
 description   = "Mongo Rust driver built on top of the Mongo C driver"
 readme        = "README.md"