1 files changed, 3 insertions, 1 deletions
diff --git a/lib/invoices.js b/lib/invoices.js
index f17223aa..814e87d9 100644
--- a/lib/invoices.js
+++ b/lib/invoices.js
@@ -12,9 +12,11 @@ import ln from "$lib/ln";
 export let generate = async ({ invoice, user, sender }) => {
   let { currency, tip, amount, rate, request_id, type } = invoice;
 
+  amount = parseInt(amount);
+  tip = parseInt(tip || 0);
+
   if (amount < 0) fail("amount out of range");
   if (tip > 5 * amount || tip < 0) fail("tip amount out of range");
-  tip = tip || 0;
 
   if (!user) user = sender;
   let uid = await g(`user:${user.username}`);