diff --git a/gso/auth/oidc_policy_helper.py b/gso/auth/oidc_policy_helper.py
index 34eeede9e310a03b9774d619d6d7a7ab58a50231..1ba2eb3b8cdb3db63babe30beabf2c6186e3ae3c 100644
--- a/gso/auth/oidc_policy_helper.py
+++ b/gso/auth/oidc_policy_helper.py
@@ -425,7 +425,7 @@ def opa_decision(
                 **(opa_kwargs or {}),
                 **user_info,
                 "resource": request.url.path,
-                "method": request_method,
+                "method": request_method.upper(),
                 "arguments": {"path": request.path_params, "query": {**request.query_params}, "json": json},
             }
         }