diff --git a/src/schemas/OpenidAuthorizationServerMetadataSchema.ts b/src/schemas/OpenidAuthorizationServerMetadataSchema.ts
index fa6ffbe..b5a7c76 100644
--- a/src/schemas/OpenidAuthorizationServerMetadataSchema.ts
+++ b/src/schemas/OpenidAuthorizationServerMetadataSchema.ts
@@ -4,13 +4,18 @@ export const OpenidAuthorizationServerMetadataSchema = z.object({
 	issuer: z.string(),
 	authorization_endpoint: z.string(),
 	token_endpoint: z.string(),
-	pushed_authorization_request_endpoint: z.string(),
+	pushed_authorization_request_endpoint: z.string().optional(),
 	authorization_challenge_endpoint: z.string().optional(),
 	require_pushed_authorization_requests: z.boolean().optional(),
 	token_endpoint_auth_methods_supported: z.array(z.string()).optional(),
 	response_types_supported: z.array(z.string()),
 	code_challenge_methods_supported: z.array(z.string()).optional(),
 	dpop_signing_alg_values_supported: z.array(z.string()).optional(),
+}).refine((input: { require_pushed_authorization_requests?: boolean, pushed_authorization_request_endpoint: string }) => {
+	if (input.require_pushed_authorization_requests) {
+    return input.pushed_authorization_request_endpoint && input.pushed_authorization_request_endpoint.length > 0;
+	}
+	return true;
 });
 
 export type OpenidAuthorizationServerMetadata = z.infer<typeof OpenidAuthorizationServerMetadataSchema>;