diff --git a/ci/prepare-config.ts b/ci/prepare-config.ts
index 0e30c835..e577d0d5 100644
--- a/ci/prepare-config.ts
+++ b/ci/prepare-config.ts
@@ -45,7 +45,7 @@ if (process.env.CI) {
       },
       "mode": {
         "url": "${process.env.MODE_RPC_ENDPOINT}"
-      }
+      },
       "sonic": {
         "url": "${process.env.SONIC_RPC_ENDPOINT}"
       }