diff --git a/_data/chains/eip155-239.json b/_data/chains/eip155-239.json
index 73c02a51..aa936059 100644
--- a/_data/chains/eip155-239.json
+++ b/_data/chains/eip155-239.json
@@ -20,7 +20,7 @@
 
   "explorers": [{
     "name": "AITD Chain Explorer",
-    "url": "http://aitd-explorer-pre.aitdcoin.com",
+    "url": "https://aitd-explorer-pre.aitdcoin.com",
     "standard": "EIP3091"
   }]
 }