diff --git a/backend/controllers/lnd/payments.js b/backend/controllers/lnd/payments.js
index 672a5363..acf7ce58 100644
--- a/backend/controllers/lnd/payments.js
+++ b/backend/controllers/lnd/payments.js
@@ -111,7 +111,7 @@ export const sendPayment = (req, res, next) => {
         req.body.last_hop_pubkey = Buffer.from(req.body.last_hop_pubkey, 'hex').toString('base64');
     }
     req.body.amp = req.body.amp ?? false;
-    req.body.timeout_seconds = req.body.timeout_seconds || 600;
+    req.body.timeout_seconds = (Number.isFinite(+req.body.timeout_seconds) && +req.body.timeout_seconds > 0) ? +req.body.timeout_seconds : 600;
     options.form = JSON.stringify(req.body);
     logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Payments', msg: 'Send Payment Options', data: options.form });
     // LND ends the stream at timeout_seconds with a FAILURE_REASON_TIMEOUT result;
diff --git a/server/controllers/lnd/payments.ts b/server/controllers/lnd/payments.ts
index 1fa1642b..11e104ac 100644
--- a/server/controllers/lnd/payments.ts
+++ b/server/controllers/lnd/payments.ts
@@ -109,7 +109,7 @@ export const sendPayment = (req, res, next) => {
     req.body.last_hop_pubkey = Buffer.from(req.body.last_hop_pubkey, 'hex').toString('base64');
   }
   req.body.amp = req.body.amp ?? false;
-  req.body.timeout_seconds = req.body.timeout_seconds || 600;
+  req.body.timeout_seconds = (Number.isFinite(+req.body.timeout_seconds) && +req.body.timeout_seconds > 0) ? +req.body.timeout_seconds : 600;
   options.form = JSON.stringify(req.body);
   logger.log({ selectedNode: req.session.selectedNode, level: 'DEBUG', fileName: 'Payments', msg: 'Send Payment Options', data: options.form });
   // LND ends the stream at timeout_seconds with a FAILURE_REASON_TIMEOUT result;