diff --git a/src/client/interface.ts b/src/client/interface.ts
index f1f59cd1..7a48218e 100644
--- a/src/client/interface.ts
+++ b/src/client/interface.ts
@@ -27,7 +27,7 @@ export interface OffChainTokenConfig extends IssuerConfigInterface {
 }
 
 export interface OnChainTokenConfig extends IssuerConfigInterface {
-	onChain: boolean
+	onChain: true
 	contract: string
 	chain: string
 	openSeaSlug?: string