diff --git a/backend/src/main/kotlin/com/retypeme/project/chain/ConfigReaderService.kt b/backend/src/main/kotlin/com/retypeme/project/chain/ConfigReaderService.kt
index 506d2fc..646b281 100644
--- a/backend/src/main/kotlin/com/retypeme/project/chain/ConfigReaderService.kt
+++ b/backend/src/main/kotlin/com/retypeme/project/chain/ConfigReaderService.kt
@@ -9,21 +9,11 @@ class ConfigReaderService {
     val config: String =
         """
   chains:
- 
-  - id: 168587773
-    name: blast-sepolia
-    rpc: "https://blast-sepolia.infura.io/v3"
-    contract: "0xb3c33b58de859a5e06aff62c9d66319c256218da"
-    
+
   - id: 84532
     name: base-sepolia
     rpc: "https://sepolia.base.org"
     contract: "0xb4eb30e7f583d788a1611f4b7022bdda4bd4af81"
- 
-  - id: 5611
-    name: opbnb-testnet-rpc
-    rpc: "https://opbnb-testnet-rpc.bnbchain.org"
-    contract: "0x247e2bee76ec31c1a4caaf06600a80ffd6774dd6"
     
 """.trimIndent()
 
diff --git a/frontend/src/app/components/leaderboard-card/leaderboardCard.tsx b/frontend/src/app/components/leaderboard-card/leaderboardCard.tsx
index 9146189..acf11c1 100644
--- a/frontend/src/app/components/leaderboard-card/leaderboardCard.tsx
+++ b/frontend/src/app/components/leaderboard-card/leaderboardCard.tsx
@@ -35,8 +35,8 @@ export function LeaderboardCard() {
   const [leaderboard, setLeaderboard] = useState<LeaderboardEntry[]>([]);
   const { chainId } = useAccount();
   const chainBlockExplorerLinks: Record<number, string> = {
-    5611: "https://opbnb-testnet.bscscan.com/address/",
-    168587773: "https://testnet.blastscan.io/address/",
+    // 5611: "https://opbnb-testnet.bscscan.com/address/",
+    // 168587773: "https://testnet.blastscan.io/address/",
     84532: "https://sepolia.basescan.org/address/",
   };
 
diff --git a/frontend/src/app/store/configStore.ts b/frontend/src/app/store/configStore.ts
index 1cb2dc1..7d77310 100644
--- a/frontend/src/app/store/configStore.ts
+++ b/frontend/src/app/store/configStore.ts
@@ -229,24 +229,24 @@ const chains: ChainConfig[] = [
   //   "rpc": `https://scroll-sepolia.core.chainstack.com/c02e3ccda5dd045b98b943c1ab129544`,
   //   "contract": "0x078869dd68d019900098b5b1006951ea7b3f01f2"
   // },
-  {
-    id: 5611,
-    name: "opbnb-testnet",
-    rpc: "https://opbnb-testnet-rpc.publicnode.com",
-    contract: "0x247e2bee76ec31c1a4caaf06600a80ffd6774dd6",
-  },
+  // {
+  //   id: 5611,
+  //   name: "opbnb-testnet",
+  //   rpc: "https://opbnb-testnet-rpc.publicnode.com",
+  //   contract: "0x247e2bee76ec31c1a4caaf06600a80ffd6774dd6",
+  // },
   {
     id: 84532,
     name: "base-sepolia",
     rpc: "https://sepolia.base.org",
     contract: "0xb4eb30e7f583d788a1611f4b7022bdda4bd4af81",
   },
-  {
-    id: 168587773,
-    name: "blast-sepolia",
-    rpc: `https://blast-sepolia.infura.io/v3/91f259e2739445678d072c85496b47b7`,
-    contract: "0xb3c33b58de859a5e06aff62c9d66319c256218da",
-  },
+  // {
+  //   id: 168587773,
+  //   name: "blast-sepolia",
+  //   rpc: `https://blast-sepolia.infura.io/v3/91f259e2739445678d072c85496b47b7`,
+  //   contract: "0xb3c33b58de859a5e06aff62c9d66319c256218da",
+  // },
   // {
   //   "id": 80002,
   //   "name": "polygon-amoy",