diff --git a/_data/chains/eip155-43.json b/_data/chains/eip155-43.json
index a0609fc1..1360967d 100644
--- a/_data/chains/eip155-43.json
+++ b/_data/chains/eip155-43.json
@@ -2,7 +2,7 @@
   "name": "Darwinia Pangolin Testnet",
   "chain": "pangolin",
   "rpc": [
-    "http://pangolin-rpc.darwinia.network"
+    "https://pangolin-rpc.darwinia.network"
   ],
   "faucets": [
     "https://docs.crab.network/dvm/wallets/dvm-metamask#apply-for-the-test-token"
diff --git a/_data/chains/eip155-44.json b/_data/chains/eip155-44.json
index bed4cee7..f461a3e9 100644
--- a/_data/chains/eip155-44.json
+++ b/_data/chains/eip155-44.json
@@ -2,7 +2,7 @@
   "name": "Darwinia Crab Network",
   "chain": "crab",
   "rpc": [
-    "http://crab-rpc.darwinia.network"
+    "https://crab-rpc.darwinia.network"
   ],
   "faucets": [],
   "nativeCurrency": {