diff --git a/services/mana-core-auth/src/auth/better-auth.config.ts b/services/mana-core-auth/src/auth/better-auth.config.ts
index e55d0f1b4..3e115e835 100644
--- a/services/mana-core-auth/src/auth/better-auth.config.ts
+++ b/services/mana-core-auth/src/auth/better-auth.config.ts
@@ -331,8 +331,8 @@ export function createBetterAuth(databaseUrl: string) {
 						clientId: 'matrix-synapse',
 						clientSecret: process.env.SYNAPSE_OIDC_CLIENT_SECRET || '',
 						name: 'Matrix Synapse',
-						icon: null,
-						metadata: null,
+						icon: undefined,
+						metadata: {},
 						type: 'web',
 						disabled: false,
 						redirectUrls: ['https://matrix.mana.how/_synapse/client/oidc/callback'],