diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6325b2c..c2a09e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 
 # Changelog
 
+## 0.4.0
+* Abstract signing support: provide traits to abstract private and public keys.
+* Support signing with a TPM-backed private key via the `key_tpm` feature.
+
 ## 0.3.0
 
 * **Breaking change**: Use upper case acronyms as advised by clippy
diff --git a/Cargo.toml b/Cargo.toml
index 1b44c91..2a96aa3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "aws-nitro-enclaves-cose"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Petre Eftime <epetre@amazon.com>"]
 edition = "2018"
 license = "Apache-2.0"