diff --git a/README.md b/README.md
index 93c7e36..be32609 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ venv와 패키지가 설치가 됩니다.
 browser_use가 Playwright에 대한 의존성이 있어 브라우저 설치가 필요합니다
 
 ```
-playwright install chromium
+playwright install chromium --with-deps --no-shell
 ```
 
 다음과 같은 명령어로 실행합니다.
diff --git a/main.py b/main.py
index e6681d6..a8b91a1 100644
--- a/main.py
+++ b/main.py
@@ -11,8 +11,10 @@ import csv
 
 load_dotenv()
 
-if os.getenv("GOOGLE_API_KEY") is None:
-    raise ValueError("GOOGLE_API_KEY environment variable is not set.")
+if os.getenv("OPENAI_API_KEY") is None:
+    raise ValueError("OPENAI_API_KEY environment variable not set.")
+if os.getenv("OPENAI_MODEL") is None:
+    raise ValueError("OPENAI_MODEL environment variable not set.")
 
 browser_config_kwargs = browser_config_kwargs()
 
@@ -57,7 +59,10 @@ async def main():
     )
 
     response = await agent.run()
-    result = json.loads(response.final_result())
+    final_result = response.final_result()
+    if final_result is None:
+        raise ValueError("final_result() returned None")
+    result = json.loads(final_result)
     print(result)
     
     # {"oauth_providers": ["GitHub", "Passkey"]} print