diff --git a/fastapi/security/oauth2.py b/fastapi/security/oauth2.py
index 5ffad5986..3a6560d45 100644
--- a/fastapi/security/oauth2.py
+++ b/fastapi/security/oauth2.py
@@ -457,11 +457,24 @@ class OAuth2PasswordBearer(OAuth2):
                 """
             ),
         ] = True,
+        refreshUrl: Annotated[
+            Optional[str],
+            Doc(
+                """
+                The URL to refresh the token and obtain a new one.
+                """
+            ),
+        ] = None,
     ):
         if not scopes:
             scopes = {}
         flows = OAuthFlowsModel(
-            password=cast(Any, {"tokenUrl": tokenUrl, "scopes": scopes})
+            password=cast(
+                Any,
+                {"tokenUrl": tokenUrl, "refreshUrl": refreshUrl, "scopes": scopes}
+                if refreshUrl
+                else {"tokenUrl": tokenUrl, "scopes": scopes},
+            )
         )
         super().__init__(
             flows=flows,