diff --git a/README.md b/README.md
index 1a4ae19..e197c8f 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,16 @@ prompt = '''
 result, notes = chat(prompt, test=False) 
 print(result)
 ```
+## Defining Api Keys ( .env file )
+
+```bash
+  # .env file content 
+
+  OPENAI_API_KEY = "sk-proj-ABCDEFGIJKLMNOPQRSTUXVZ"
+  EVDS_API_KEY=ABCDEFGIJKLMNOP
+
+```
+
 
 
 ## New in this version 
diff --git a/evdschat/core/chat.py b/evdschat/core/chat.py
index f8f352e..3183c5a 100644
--- a/evdschat/core/chat.py
+++ b/evdschat/core/chat.py
@@ -87,7 +87,11 @@ def chat_console():
     result, notes = chat(prompt=args.prompt, debug=args.debug, test=args.test)
     print(result)
     print(notes)
-    result.to_excel(f"{args.file_name}.xlsx")
+    def correct(x:str):
+        if x.endswith('.xlsx') : return x 
+        return f'{x}.xlsx'
+    
+    result.to_excel(f"{correct(args.file_name)}")
 
 
 if __name__ == "__main__":