diff --git a/src/config/chains/crab.ts b/src/config/chains/crab.ts
index 3301000..58e413c 100644
--- a/src/config/chains/crab.ts
+++ b/src/config/chains/crab.ts
@@ -5,7 +5,7 @@ export const crabChainConfig: ChainConfig = {
   chainId: ChainID.CRAB,
   explorer: {
     name: "Subscan",
-    url: "https://crab.subscan.io/",
+    url: "https://crab-scan.darwinia.network/",
   },
   rpcMetas: [
     {
@@ -14,12 +14,8 @@ export const crabChainConfig: ChainConfig = {
     },
     {
       name: "Darwinia Community",
-      url: "https://crab-rpc.darwiniacommunitydao.xyz",
-    },
-    {
-      name: "Dwellir",
-      url: "https://darwiniacrab-rpc.dwellir.com",
-    },
+      url: "https://crab-rpc.dcdao.box",
+    }
   ],
   nativeToken: {
     symbol: "CRAB",
diff --git a/src/config/chains/darwinia.ts b/src/config/chains/darwinia.ts
index 85ffd57..d2cf806 100644
--- a/src/config/chains/darwinia.ts
+++ b/src/config/chains/darwinia.ts
@@ -14,7 +14,7 @@ export const darwiniaChainConfig: ChainConfig = {
     },
     {
       name: "Darwinia Community",
-      url: "https://darwinia-rpc.darwiniacommunitydao.xyz",
+      url: "https://crab-rpc.dcdao.box/",
     },
     {
       name: "Dwellir",