diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..d66e8aa
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,4 @@
+## [1.0.0] - 2026-01-21
+
+* 🥳 Official Release
+
diff --git a/pyproject.toml b/pyproject.toml
index 8f953e7..4512d89 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "automtu"
-version = "0.1.0"
+version = "1.0.0"
 description = "Auto-detect egress interface, probe Path MTU, and apply MTU (WireGuard/egress)."
 readme = "README.md"
 requires-python = ">=3.10"