diff --git a/src/utils/userScripts.js b/src/utils/userScripts.js
index 203a66b..9a44233 100644
--- a/src/utils/userScripts.js
+++ b/src/utils/userScripts.js
@@ -14,12 +14,19 @@ export const isUserScriptsAvailable = async () => {
 export const wrapScriptCode = (code, secrets = {}) => {
   const envInjection = `
 // [OpenScript Injected Environment]
-const OpenScript = Object.freeze({
-  version: "1.0.0",
-  env: Object.freeze(${JSON.stringify(secrets)})
-});
-const env = OpenScript.env;
-const GM_getValue = (k, def) => (OpenScript.env[k] ?? def);
+(function() {
+  const secretsObj = Object.freeze(${JSON.stringify(secrets)});
+  const openScriptObj = Object.freeze({
+    version: "1.0.0",
+    env: secretsObj
+  });
+  globalThis.OpenScript = openScriptObj;
+  globalThis.env = secretsObj;
+  globalThis.GM_getValue = (k, def) => (secretsObj[k] ?? def);
+})();
+var OpenScript = globalThis.OpenScript;
+var env = globalThis.env;
+var GM_getValue = globalThis.GM_getValue;
 `;
   return `${envInjection}\n${code}`;
 };
diff --git a/tests/parser.test.js b/tests/parser.test.js
index e351e79..6b0ed4f 100644
--- a/tests/parser.test.js
+++ b/tests/parser.test.js
@@ -50,10 +50,10 @@ test('wrapScriptCode injects OpenScript.env and GM_getValue polyfill', () => {
   const code = 'console.log(env.API_KEY, GM_getValue("API_KEY"));';
   const wrapped = wrapScriptCode(code, { API_KEY: 'secret123' });
 
-  assert.ok(wrapped.includes('const OpenScript = Object.freeze('));
+  assert.ok(wrapped.includes('OpenScript'));
   assert.ok(wrapped.includes('"API_KEY":"secret123"'));
-  assert.ok(wrapped.includes('const env = OpenScript.env;'));
-  assert.ok(wrapped.includes('const GM_getValue ='));
+  assert.ok(wrapped.includes('globalThis.OpenScript'));
+  assert.ok(wrapped.includes('GM_getValue'));
   assert.ok(wrapped.includes(code));
 });