diff --git a/docs_src/security/tutorial004_an_py310.py b/docs_src/security/tutorial004_an_py310.py
index 685cb034e..d5c4deda5 100644
--- a/docs_src/security/tutorial004_an_py310.py
+++ b/docs_src/security/tutorial004_an_py310.py
@@ -1,3 +1,4 @@
+import os
 from datetime import datetime, timedelta, timezone
 from typing import Annotated
 
@@ -10,7 +11,7 @@ from pydantic import BaseModel
 
 # to get a string like this run:
 # openssl rand -hex 32
-SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
+SECRET_KEY = os.getenv("SECRET_KEY", "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7")
 ALGORITHM = "HS256"
 ACCESS_TOKEN_EXPIRE_MINUTES = 30
 
@@ -97,7 +98,9 @@ async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
         headers={"WWW-Authenticate": "Bearer"},
     )
     try:
-        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        payload = jwt.decode(
+            token, SECRET_KEY, algorithms=[ALGORITHM], options={"require": ["exp"]}
+        )
         username = payload.get("sub")
         if username is None:
             raise credentials_exception