diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..034e848
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,21 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :white_check_mark: |
+| < 4.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Use this section to tell people how to report a vulnerability.
+
+Tell them where to go, how often they can expect to get an update on a
+reported vulnerability, what to expect if the vulnerability is accepted or
+declined, etc.
diff --git a/src/adaptive.ts b/src/adaptive.ts
index cc1341c..0f1c909 100644
--- a/src/adaptive.ts
+++ b/src/adaptive.ts
@@ -2,7 +2,7 @@
  * @Author: early-autumn
  * @Date: 2020-04-17 12:18:25
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-22 09:25:03
+ * @LastEditTime: 2020-04-22 09:37:49
  */
 import { Adapter, Platform } from './types';
 
@@ -34,14 +34,13 @@ const stack = [
 function adaptive(): Adapter | undefined {
   let adapter: Adapter | undefined;
 
+  const platform = stack.shift();
+
+  if (platform === undefined) {
+    return;
+  }
+
   try {
-    const platform = stack.shift();
-
-    if (platform === undefined) {
-      return;
-    }
-
-    // platform() 可能会导致程序进入 catch
     adapter = platform();
   } catch (err) {}