diff --git a/chaindata.json b/chaindata.json
index 043c66ffec..94896f7995 100644
--- a/chaindata.json
+++ b/chaindata.json
@@ -13,7 +13,6 @@
       "wss://rpc.dotters.network/polkadot",
       "wss://1rpc.io/dot",
       "wss://rpc-polkadot.luckyfriday.io",
-      "wss://rpc.polkadot.io",
       "wss://polkadot.public.curie.radiumblock.co/ws",
       "wss://dot-rpc.stakeworld.io"
     ]
@@ -32,7 +31,6 @@
       "wss://rpc.dotters.network/kusama",
       "wss://1rpc.io/ksm",
       "wss://rpc-kusama.luckyfriday.io",
-      "wss://kusama-rpc.polkadot.io",
       "wss://kusama.public.curie.radiumblock.co/ws",
       "wss://ksm-rpc.stakeworld.io"
     ]
diff --git a/scripts/import-pjs-config.js b/scripts/import-pjs-config.js
index 7894416ea7..99fed60efd 100644
--- a/scripts/import-pjs-config.js
+++ b/scripts/import-pjs-config.js
@@ -45,6 +45,9 @@ const unreliableRpcProviders = [
 
   // test if rpc ends with `onfinality.io/public-ws` or `onfinality.io/public-ws/`
   /onfinality\.io\/public-ws\/?$/i,
+
+  // test if rpc ends with `rpc.polkadot.io` or `kusama-rpc.polkadot.io`
+  /(?:kusama-)?rpc\.polkadot\.io\/?$/i,
 ]
 
 const sortGoodFirst = (a, b) => {