diff --git a/fastapi/openapi/models.py b/fastapi/openapi/models.py
index 5f3bdbb20..eb192f750 100644
--- a/fastapi/openapi/models.py
+++ b/fastapi/openapi/models.py
@@ -507,6 +507,7 @@ class OAuthFlowImplicit(OAuthFlow):
 
 class OAuthFlowPassword(OAuthFlow):
     tokenUrl: str
+    refreshUrl: Optional[str]
 
 
 class OAuthFlowClientCredentials(OAuthFlow):
diff --git a/fastapi/security/oauth2.py b/fastapi/security/oauth2.py
index 9720cace0..7ffb121da 100644
--- a/fastapi/security/oauth2.py
+++ b/fastapi/security/oauth2.py
@@ -408,6 +408,14 @@ class OAuth2PasswordBearer(OAuth2):
                 """
             ),
         ],
+        refreshUrl: Annotated[
+            Optional[str],
+            Doc(
+                """
+                The URL to refresh the token and obtain a new one.
+                """
+            ),
+        ],
         scheme_name: Annotated[
             Optional[str],
             Doc(
@@ -461,7 +469,9 @@ class OAuth2PasswordBearer(OAuth2):
         if not scopes:
             scopes = {}
         flows = OAuthFlowsModel(
-            password=cast(Any, {"tokenUrl": tokenUrl, "scopes": scopes})
+            password=cast(
+                Any, {"tokenUrl": tokenUrl, "refreshUrl": refreshUrl, "scopes": scopes}
+            )
         )
         super().__init__(
             flows=flows,