diff --git a/src/useChainInfo.ts b/src/useChainInfo.ts
index 0d494b9..5cd0f01 100644
--- a/src/useChainInfo.ts
+++ b/src/useChainInfo.ts
@@ -25,24 +25,30 @@ export const useChainInfoFromMetadataFile = (
   const [chainInfo, setChainInfo] = useState<ChainInfo | undefined>(undefined);
 
   useEffect(() => {
-    if (chainId === undefined) {
+    if (assetsURLPrefix === undefined || chainId === undefined) {
       setChainInfo(undefined);
       return;
     }
 
     const readChainInfo = async () => {
-      const res = await fetch(chainInfoURL(assetsURLPrefix!, chainId));
-      if (!res.ok) {
+      try {
+        const res = await fetch(chainInfoURL(assetsURLPrefix, chainId));
+        if (!res.ok) {
+          setChainInfo(defaultChainInfo);
+          return;
+        }
+        const info = await res.json();
+
+        setChainInfo({
+          nativeName: info.nativeCurrency.name,
+          nativeDecimals: info.nativeCurrency.decimals,
+          nativeSymbol: info.nativeCurrency.symbol,
+        });
+      } catch (err) {
+        // ignore
         setChainInfo(defaultChainInfo);
         return;
       }
-      const info = await res.json();
-
-      setChainInfo({
-        nativeName: info.nativeCurrency.name,
-        nativeDecimals: info.nativeCurrency.decimals,
-        nativeSymbol: info.nativeCurrency.symbol,
-      });
     };
     readChainInfo();
   }, [assetsURLPrefix, chainId]);