diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1dff54fb..f4b9ffa7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,11 +10,14 @@
 ### Removed
 
 ### Fixed
-- Potential deadlock in `Lazy` when accessed for the first time from
-  multiple threads simultaneously.
 
 ### Security
 
+## [0.6.4] - 2024-05-08
+### Fixed
+- Potential deadlock in `Lazy` when accessed for the first time from
+  multiple threads simultaneously.
+
 ## [0.6.3] - 2024-03-31
 ### Fixed
 - Missing ` IntoValueFromNative` implementation for `Vec` and `HashMap`.
@@ -412,7 +415,8 @@
 - Pre-built bindings for Ruby 2.6 - 3.1 on common platforms, build-time
   generated bindings otherwise.
 
-[Unreleased]: https://github.com/matsadler/magnus/compare/0.6.3...0.6
+[Unreleased]: https://github.com/matsadler/magnus/compare/0.6.4...0.6
+[0.6.3]: https://github.com/matsadler/magnus/compare/0.6.3...0.6.4
 [0.6.2]: https://github.com/matsadler/magnus/compare/0.6.2...0.6.3
 [0.6.2]: https://github.com/matsadler/magnus/compare/0.6.1...0.6.2
 [0.6.1]: https://github.com/matsadler/magnus/compare/0.6.0...0.6.1
diff --git a/Cargo.lock b/Cargo.lock
index 505efe8e..a407653a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -120,7 +120,7 @@ dependencies = [
 
 [[package]]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "bytes",
  "magnus",
diff --git a/Cargo.toml b/Cargo.toml
index 77e845f0..c17c337d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 edition = "2021"
 description = "High level Ruby bindings. Write Ruby extension gems in Rust, or call Ruby code from a Rust binary."
 keywords = ["ruby", "rubygem", "extension", "gem"]
diff --git a/examples/complete_object/ext/temperature/Cargo.lock b/examples/complete_object/ext/temperature/Cargo.lock
index 989116d2..354b84df 100644
--- a/examples/complete_object/ext/temperature/Cargo.lock
+++ b/examples/complete_object/ext/temperature/Cargo.lock
@@ -99,7 +99,7 @@ dependencies = [
 
 [[package]]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "magnus-macros",
  "rb-sys",
diff --git a/examples/custom_exception_ruby/ext/ahriman/Cargo.lock b/examples/custom_exception_ruby/ext/ahriman/Cargo.lock
index 364dc7ea..985fb4a0 100644
--- a/examples/custom_exception_ruby/ext/ahriman/Cargo.lock
+++ b/examples/custom_exception_ruby/ext/ahriman/Cargo.lock
@@ -107,7 +107,7 @@ dependencies = [
 
 [[package]]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "magnus-macros",
  "rb-sys",
diff --git a/examples/custom_exception_rust/ext/ahriman/Cargo.lock b/examples/custom_exception_rust/ext/ahriman/Cargo.lock
index 364dc7ea..985fb4a0 100644
--- a/examples/custom_exception_rust/ext/ahriman/Cargo.lock
+++ b/examples/custom_exception_rust/ext/ahriman/Cargo.lock
@@ -107,7 +107,7 @@ dependencies = [
 
 [[package]]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "magnus-macros",
  "rb-sys",
diff --git a/examples/rust_blank/ext/rust_blank/Cargo.lock b/examples/rust_blank/ext/rust_blank/Cargo.lock
index 93a5db66..6cd58d6f 100644
--- a/examples/rust_blank/ext/rust_blank/Cargo.lock
+++ b/examples/rust_blank/ext/rust_blank/Cargo.lock
@@ -99,7 +99,7 @@ dependencies = [
 
 [[package]]
 name = "magnus"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "magnus-macros",
  "rb-sys",