diff --git a/supertokens_python/recipe/oauth2provider/api/auth.py b/supertokens_python/recipe/oauth2provider/api/auth.py
index 5b5767e6..8db3e7eb 100644
--- a/supertokens_python/recipe/oauth2provider/api/auth.py
+++ b/supertokens_python/recipe/oauth2provider/api/auth.py
@@ -86,7 +86,7 @@ async def auth_get(
                     httponly=morsel.get("httponly", True),
                     expires=datetime.strptime(morsel.get("expires", ""), "%a, %d %b %Y %H:%M:%S %Z").timestamp() * 1000,  # type: ignore
                     path=morsel.get("path", "/"),
-                    samesite=morsel.get("samesite", "lax"),
+                    samesite=morsel.get("samesite", "lax").lower(),
                 )
         return api_options.response.redirect(response.redirect_to)
     elif isinstance(response, ErrorOAuth2Response):
diff --git a/supertokens_python/recipe/oauth2provider/api/login.py b/supertokens_python/recipe/oauth2provider/api/login.py
index d080211f..a4d3e181 100644
--- a/supertokens_python/recipe/oauth2provider/api/login.py
+++ b/supertokens_python/recipe/oauth2provider/api/login.py
@@ -88,7 +88,7 @@ async def login(
                     httponly=morsel.get("httponly", True),
                     expires=datetime.strptime(morsel.get("expires", ""), "%a, %d %b %Y %H:%M:%S %Z").timestamp() * 1000,  # type: ignore
                     path=morsel.get("path", "/"),
-                    samesite=morsel.get("samesite", "lax"),
+                    samesite=morsel.get("samesite", "lax").lower(),
                 )
 
         return send_200_response(
diff --git a/supertokens_python/recipe/oauth2provider/recipe_implementation.py b/supertokens_python/recipe/oauth2provider/recipe_implementation.py
index a3252e22..d2a82f50 100644
--- a/supertokens_python/recipe/oauth2provider/recipe_implementation.py
+++ b/supertokens_python/recipe/oauth2provider/recipe_implementation.py
@@ -310,14 +310,16 @@ async def authorization(
 
             payloads = {"idToken": id_token, "accessToken": access_token}
 
+        request_body = {
+            "params": {**params, "scope": " ".join(scopes)},
+            "iss": await OpenIdRecipe.get_issuer(user_context),
+            "session": payloads,
+        }
+        if cookies is not None:
+            request_body["cookies"] = cookies
         resp = await self.querier.send_post_request(
             NormalisedURLPath("/recipe/oauth/auth"),
-            {
-                "params": {**params, "scope": " ".join(scopes)},
-                "iss": await OpenIdRecipe.get_issuer(user_context),
-                "cookies": cookies,
-                "session": payloads,
-            },
+            request_body,
             user_context,
         )