diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ad7d19..b9c0d9a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## v0.4.0
+* Update `generic-ec` dep to `v0.4` [#7]
+
+[#7]: https://github.com/dfns/slip-10/pull/7
+
 ## v0.3.0
 * Update `generic-ec` dependency to `v0.3` [#6]
 
diff --git a/Cargo.lock b/Cargo.lock
index 8fa6617..fd3be8b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -439,7 +439,7 @@ dependencies = [
 
 [[package]]
 name = "slip-10"
-version = "0.3.0"
+version = "0.4.0-rc3"
 dependencies = [
  "generic-array",
  "generic-ec",
diff --git a/Cargo.toml b/Cargo.toml
index 50690f9..d288aa3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "slip-10"
-version = "0.3.0"
+version = "0.4.0-rc3"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "SLIP10 implementation in Rust"