diff --git a/bot/modules/nostr/lib.ts b/bot/modules/nostr/lib.ts
index 9feed49c..44557c12 100644
--- a/bot/modules/nostr/lib.ts
+++ b/bot/modules/nostr/lib.ts
@@ -4,7 +4,9 @@ export const decodeNpub = (npub: string) => {
   try {
     const { type, data } = nip19.decode(npub);
     if (type === 'npub') return data;
-  } catch (err) {}
+  } catch (err) {
+    return null;
+  }
 };
 export const encodeNpub = (hex: string) => {
   return nip19.npubEncode(hex);