diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9161a788..c2370b01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# [4.0.0] - Unreleased
+# [4.0.0-beta.1] - 2026-10-08
 
 4.0 是插件化重构的大版本（设计见 `docs/plans/2026-10-08-plugin-architecture-4.0-design.md`）。本节随各阶段合入持续更新。
 
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 36cc4f5b..afab8b6d 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "auto-bangumi"
-version = "3.3.6"
+version = "4.0.0-beta.1"
 description = "AutoBangumi - Automated anime download manager"
 requires-python = ">=3.13"
 dependencies = [
diff --git a/backend/uv.lock b/backend/uv.lock
index 4c7d7a37..18fb5f99 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -125,7 +125,7 @@ wheels = [
 
 [[package]]
 name = "auto-bangumi"
-version = "3.3.6"
+version = "4.0.0b1"
 source = { virtual = "." }
 dependencies = [
     { name = "aiosqlite" },