diff --git a/definition/mainnets/ponder.crab.ts b/definition/mainnets/ponder.crab.ts
index 3130265..fcaef85 100644
--- a/definition/mainnets/ponder.crab.ts
+++ b/definition/mainnets/ponder.crab.ts
@@ -14,7 +14,7 @@ export default createConfig({
     crab: {
       chainId: 44,
       transport: loadBalance([
-        http("http://c1.crab-rpc.itering.io:9944/"),
+        http(progress.env.ENDPOINT_44 || "http://c1.crab-rpc.itering.io:9944/"),
         // http("https://hrpc.darwinia.network/crab"),
         // http("http://c2.crab-rpc.itering.io:9944/"),
         // http("http://g1.crab2.darwinia.network:9944/"),
diff --git a/definition/mainnets/ponder.darwinia.ts b/definition/mainnets/ponder.darwinia.ts
index ec87845..17d4b57 100644
--- a/definition/mainnets/ponder.darwinia.ts
+++ b/definition/mainnets/ponder.darwinia.ts
@@ -13,7 +13,7 @@ export default createConfig({
   networks: {
     darwinia: {
       chainId: 46,
-      transport: http("http://c2.darwinia-rpc.itering.io:9944/"),
+      transport: http(progress.env.ENDPOINT_46 || "http://c2.darwinia-rpc.itering.io:9944/"),
       // transport: http("https://hrpc.darwinia.network/darwinia"),
       maxRequestsPerSecond: MAX_REQUESTS_PER_SECOND,
     },