diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..8f67d42
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+## [1.0.0](https://github.com/tkrs/poston/compare/v0.7.8...v1.0.0) (2024-12-17)
+
+
+### ⚠ BREAKING CHANGES
+
+* enhance error structures
+
+### Features
+
+* enhance error structures ([34b4776](https://github.com/tkrs/poston/commit/34b4776a262bb914b81810f74f3fa7cef00f6809))
diff --git a/Cargo.toml b/Cargo.toml
index ba5d45a..57af9b5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 edition = "2021"
 name = "poston"
-version = "0.7.8"
+version = "1.0.0"
 authors = ["Takeru Sato <type.in.type@gmail.com>"]
 description = "Yet another Fluentd logger for Rust"
 documentation = "https://github.com/tkrs/poston"