diff --git a/docs_src/security/tutorial004.py b/docs_src/security/tutorial004.py
index 904281489..cc8d55715 100644
--- a/docs_src/security/tutorial004.py
+++ b/docs_src/security/tutorial004.py
@@ -98,7 +98,7 @@ async def get_current_user(token: str = Depends(oauth2_scheme)):
         if username is None:
             raise credentials_exception
         token_data = TokenData(username=username)
-    except ExpiredSignatureError: # Check signature expiry
+    except ExpiredSignatureError:  # Check signature expiry
         raise credentials_exception
     except JWTError:
         raise credentials_exception
diff --git a/docs_src/security/tutorial004_an.py b/docs_src/security/tutorial004_an.py
index 370acec45..8b22c537c 100644
--- a/docs_src/security/tutorial004_an.py
+++ b/docs_src/security/tutorial004_an.py
@@ -99,7 +99,7 @@ async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
         if username is None:
             raise credentials_exception
         token_data = TokenData(username=username)
-    except ExpiredSignatureError: # Check signature expiry
+    except ExpiredSignatureError:  # Check signature expiry
         raise credentials_exception
     except JWTError:
         raise credentials_exception
diff --git a/docs_src/security/tutorial004_an_py310.py b/docs_src/security/tutorial004_an_py310.py
index 487f9b168..e72fd91eb 100644
--- a/docs_src/security/tutorial004_an_py310.py
+++ b/docs_src/security/tutorial004_an_py310.py
@@ -98,7 +98,7 @@ async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
         if username is None:
             raise credentials_exception
         token_data = TokenData(username=username)
-    except ExpiredSignatureError: # Check signature expiry
+    except ExpiredSignatureError:  # Check signature expiry
         raise credentials_exception
     except JWTError:
         raise credentials_exception
diff --git a/docs_src/security/tutorial004_an_py39.py b/docs_src/security/tutorial004_an_py39.py
index e68281880..8e00a4412 100644
--- a/docs_src/security/tutorial004_an_py39.py
+++ b/docs_src/security/tutorial004_an_py39.py
@@ -98,7 +98,7 @@ async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
         if username is None:
             raise credentials_exception
         token_data = TokenData(username=username)
-    except ExpiredSignatureError: # Check signature expiry
+    except ExpiredSignatureError:  # Check signature expiry
         raise credentials_exception
     except JWTError:
         raise credentials_exception
diff --git a/docs_src/security/tutorial004_py310.py b/docs_src/security/tutorial004_py310.py
index 8e4aafd82..346fbf984 100644
--- a/docs_src/security/tutorial004_py310.py
+++ b/docs_src/security/tutorial004_py310.py
@@ -97,7 +97,7 @@ async def get_current_user(token: str = Depends(oauth2_scheme)):
         if username is None:
             raise credentials_exception
         token_data = TokenData(username=username)
-    except ExpiredSignatureError: # Check signature expiry
+    except ExpiredSignatureError:  # Check signature expiry
         raise credentials_exception
     except JWTError:
         raise credentials_exception