diff --git a/_data/chains/eip155-1688.json b/_data/chains/eip155-1688.json
index 2dcaf4c8..a70f580a 100644
--- a/_data/chains/eip155-1688.json
+++ b/_data/chains/eip155-1688.json
@@ -2,7 +2,7 @@
   "name": "LUDAN Mainnet",
   "chain": "LUDAN",
   "rpc": [
-    "http://rpc.ludan.org:55001/"
+    "https://rpc.ludan.org/"
   ],
   "faucets": [],
   "nativeCurrency": {