diff --git a/src/framex/driver/application.py b/src/framex/driver/application.py
index 3416c04..95573c0 100644
--- a/src/framex/driver/application.py
+++ b/src/framex/driver/application.py
@@ -1,6 +1,7 @@
 """Module containing FastAPI instance related functions and classes."""
 
 import json
+import os
 from collections.abc import Callable
 from contextlib import asynccontextmanager
 from datetime import UTC, datetime
@@ -27,6 +28,7 @@
 
 FRAME_START_TIME = datetime.now(tz=UTC)
 SHANGHAI_TZ = ZoneInfo("Asia/Shanghai")
+REVERSION = settings.server.reversion or os.getenv("REVERSION")
 
 
 def build_openapi_description() -> str:
@@ -42,7 +44,7 @@ def build_openapi_description() -> str:
 |--------|-------|
 | Started At | `{started_at}` |
 | Uptime | `{uptime}` |
-| Service-Version | `v{settings.server.reversion}` |
+| Service-Version | `v{REVERSION}` |
 | FrameX-Version | `v{VERSION}` |
 
 ---
diff --git a/src/framex/plugin/on.py b/src/framex/plugin/on.py
index 09df20c..cb874a5 100644
--- a/src/framex/plugin/on.py
+++ b/src/framex/plugin/on.py
@@ -37,7 +37,7 @@ def decorator(cls: type) -> type:
 
                     params = extract_method_params(func)
                     version: str = plugin.module.__plugin_meta__.version
-                    version = f"v{version}" if version.startswith("v") else version
+                    version = f"v{version}" if not version.startswith("v") else version
                     plugin_apis.append(
                         PluginApi(
                             api=path,