diff --git a/src/config/config.mainnet.ts b/src/config/config.mainnet.ts
index dfc4fe204..dd40f8d74 100644
--- a/src/config/config.mainnet.ts
+++ b/src/config/config.mainnet.ts
@@ -78,6 +78,8 @@ export default {
     },
 
     nimiqPay: {
-        cosignerPublicKeys: [],
+        cosignerPublicKeys: [
+            '91b21f4b100273bd7034f6369c29d1f7ba72dba7de6720ad3cd8b81916218913',
+        ],
     },
 };