diff --git a/Cargo.toml b/Cargo.toml
index e3120a4..7836d09 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "sgp4-rs"
-version = "0.3.8"
+version = "0.4.0"
 authors = ["Nick Pascucci <nick.pascucci@spire.com>"]
 edition = "2021"