diff --git a/Customizing-Agents.md b/Customizing-Agents.md
index 1ae966f..1ded352 100644
--- a/Customizing-Agents.md
+++ b/Customizing-Agents.md
@@ -27,7 +27,8 @@ from langchain.agents import Tool
 from langchain.utilities import GoogleSerperAPIWrapper
 
 # Initialize SerpAPI tool with your API key
-os.environ["OPENAI_API_KEY"] = ""
+os.environ["OPENAI_API_KEY"] = "Your Key"
+os.environ["SERPER_API_KEY"] = "Your Key"
 
 search = GoogleSerperAPIWrapper()