diff --git a/src/app/api/goals/route.ts b/src/app/api/goals/route.ts
index 0d616ebd3..b4b83346b 100644
--- a/src/app/api/goals/route.ts
+++ b/src/app/api/goals/route.ts
@@ -239,7 +239,7 @@ try {
   let safeDeadline: string | null = null;
   if (typeof deadline === "string") {
     const d = new Date(deadline);
-    if (!isNaN(d.getTime())) {
+    if (!Number.isNaN(d.getTime())) {
       d.setUTCHours(23, 59, 59, 999);
       safeDeadline = d.toISOString();
     }
diff --git a/src/app/api/metrics/activity/route.ts b/src/app/api/metrics/activity/route.ts
index 648696291..d41540543 100644
--- a/src/app/api/metrics/activity/route.ts
+++ b/src/app/api/metrics/activity/route.ts
@@ -167,7 +167,7 @@ export async function GET(req: NextRequest) {
   let limit = limitParam ? parseInt(limitParam, 10) : 10;
   let offset = offsetParam ? parseInt(offsetParam, 10) : 0;
 
-  if (isNaN(limit) || limit < 1) limit = 10;
+  if (Number.isNaN(limit) || limit < 1) limit = 10;
   if (limit > 100) limit = 100;
   if (isNaN(offset) || offset < 0) offset = 0;