diff --git a/frontend/.env.sepolia b/frontend/.env.sepolia
index 43753ae..ed86e03 100644
--- a/frontend/.env.sepolia
+++ b/frontend/.env.sepolia
@@ -1,3 +1,3 @@
 NEXT_PUBLIC_DAPP_ADDR="0x2540D48B63FbC123b819c81eBC4212A0c9E4432f"
 NEXT_PUBLIC_CARTESI_NODE_URL="https://rives.io"
-NEXT_PUBLIC_NETWORK_CHAIN_ID="0XAA36A7"
+NEXT_PUBLIC_NETWORK_CHAIN_ID="0xAA36A7"