diff --git a/.gitignore b/.gitignore
index 6936990..ea8c4bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1 @@
 /target
-**/*.rs.bk
-Cargo.lock
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..fa94226
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,25 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "array-queue"
+version = "0.4.0"
+dependencies = [
+ "arrayvec",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
+dependencies = [
+ "nodrop",
+]
+
+[[package]]
+name = "nodrop"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
diff --git a/Cargo.toml b/Cargo.toml
index ee00b56..dc75737 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "array-queue"
-version = "0.3.3"
+version = "0.4.0"
 authors = ["Yota Toyama <raviqqe@gmail.com>"]
 edition = "2024"
 description = "Fixed size bidirectional queues based on arrays"