diff --git a/Cargo.lock b/Cargo.lock
index 430465cf3..bbe94ec3a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5977,7 +5977,7 @@ dependencies = [
 
 [[package]]
 name = "zcash_keys"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "bech32",
  "bip32",
diff --git a/Cargo.toml b/Cargo.toml
index 6baf37ae9..8bea944b0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,7 @@ equihash = { version = "0.2", path = "components/equihash" }
 zcash_address = { version = "0.6", path = "components/zcash_address" }
 zcash_client_backend = { version = "0.13", path = "zcash_client_backend" }
 zcash_encoding = { version = "0.2.1", path = "components/zcash_encoding" }
-zcash_keys = { version = "0.3", path = "zcash_keys" }
+zcash_keys = { version = "0.4", path = "zcash_keys" }
 zcash_protocol = { version = "0.4", path = "components/zcash_protocol" }
 zip321 = { version = "0.1", path = "components/zip321" }
 
diff --git a/zcash_keys/CHANGELOG.md b/zcash_keys/CHANGELOG.md
index b92166a7e..c3db36d03 100644
--- a/zcash_keys/CHANGELOG.md
+++ b/zcash_keys/CHANGELOG.md
@@ -6,6 +6,8 @@ and this library adheres to Rust's notion of
 
 ## [Unreleased]
 
+## [0.4.0] - 2024-10-04
+
 ### Added
 - `zcash_keys::encoding::decode_extfvk_with_network`
 - `impl std::error::Error for Bech32DecodeError`
diff --git a/zcash_keys/Cargo.toml b/zcash_keys/Cargo.toml
index 0ae0d8215..5f1f5382a 100644
--- a/zcash_keys/Cargo.toml
+++ b/zcash_keys/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "zcash_keys"
 description = "Zcash key and address management"
-version = "0.3.0"
+version = "0.4.0"
 authors = [
     "Jack Grigg <jack@z.cash>",
     "Kris Nuttycombe <kris@electriccoin.co>"