diff --git a/app.py b/app.py
index 5df3657..fa1f4ab 100644
--- a/app.py
+++ b/app.py
@@ -1,4 +1,6 @@
 import os
+import tomllib
+from pathlib import Path
 
 import dotenv
 from flask import Flask
@@ -8,6 +10,21 @@ from storages.factory import StorageFactory
 
 dotenv.load_dotenv()
 
+
+# 从 pyproject.toml 读取版本号
+def get_version() -> str:
+    """从 pyproject.toml 读取项目版本号"""
+    try:
+        pyproject_path = Path(__file__).parent / "pyproject.toml"
+        with open(pyproject_path, "rb") as f:
+            pyproject_data = tomllib.load(f)
+        return pyproject_data.get("project", {}).get("version", "0.0.0")
+    except Exception:
+        return "0.0.0"
+
+
+__version__ = get_version()
+
 app = Flask(__name__)
 
 
@@ -100,9 +117,7 @@ def format_timestamp(timestamp) -> str:
     return storage.format_timestamp(timestamp)
 
 
-def generate_presigned_url(
-    s3_client, bucket_name: str, key: str, expires: int = None
-) -> str:
+def generate_presigned_url(s3_client, bucket_name: str, key: str, expires: int = None) -> str:
     """为指定对象生成 presigned URL（GET）。"""
     return storage.generate_presigned_url(key, expires)
 
@@ -112,6 +127,13 @@ def get_file_url(key: str) -> str:
     return f"/file/{key}"
 
 
+# 注册全局模板变量
+@app.context_processor
+def inject_version():
+    """向所有模板注入版本号"""
+    return {"app_version": __version__}
+
+
 if __name__ == "__main__":
     port = int(os.environ.get("PORT", 5000))
     host = os.environ.get("HOST", "0.0.0.0")
diff --git a/pyproject.toml b/pyproject.toml
index e9f850e..3e2f1dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,10 @@
 [project]
 name = "Cloud-Index"
-version = "0.1.0"
+version = "0.9.0"
 description = "A cloud storage index system based on a number of cloud storage platforms"
 authors = [{ name = "RhenCloud", email = "i@rhen.cloud" }]
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 dependencies = [
     "flask>=3.1.2",
     "uvicorn[standard]>=0.38.0",
@@ -28,7 +28,7 @@ dev = ["ruff>=0.1.6"]
 # build-backend = "setuptools.build_meta"
 
 [tool.ruff]
-line-length = 88
+line-length = 120
 select = [
     "E", # pycodestyle errors
     "W", # pycodestyle warnings
diff --git a/templates/footer.html b/templates/footer.html
index b4d7dad..bbe84f2 100644
--- a/templates/footer.html
+++ b/templates/footer.html
@@ -5,5 +5,7 @@
         <a href="https://github.com/RhenCloud/Cloud-Index" target="_blank" rel="noopener">GitHub</a>
         <span>·</span>
         <a href="mailto:i@rhen.cloud">联系</a>
+        <span>·</span>
+        <span style="color: var(--secondary-text)">v{{ app_version }}</span>
     </div>
 </footer>