diff --git a/src/app/api/local-coding/sync/route.ts b/src/app/api/local-coding/sync/route.ts
index 6b444d7f4..1c62a85ae 100644
--- a/src/app/api/local-coding/sync/route.ts
+++ b/src/app/api/local-coding/sync/route.ts
@@ -279,7 +279,7 @@ export async function GET(req: NextRequest) {
 
   const { searchParams } = new URL(req.url);
   const rawDays = parseInt(searchParams.get("days") || "30", 10);
-  const days = validateDays(isNaN(rawDays) ? DEFAULT_DAYS : rawDays);
+  const days = validateDays(Number.isNaN(rawDays) ? DEFAULT_DAYS : rawDays);
   const fromDate = new Date();
   fromDate.setDate(fromDate.getDate() - days);
   const fromDateStr = fromDate.toISOString().slice(0, 10);
diff --git a/src/app/api/metrics/contributions/route.ts b/src/app/api/metrics/contributions/route.ts
index 225440241..6c8140444 100644
--- a/src/app/api/metrics/contributions/route.ts
+++ b/src/app/api/metrics/contributions/route.ts
@@ -383,7 +383,7 @@ export async function GET(req: NextRequest) {
   } else {
     const daysParam = req.nextUrl.searchParams.get("days");
     const parsedDays = daysParam ? parseInt(daysParam, 10) : NaN;
-    days = isNaN(parsedDays) ? 30 : Math.max(1, Math.min(365, parsedDays));
+    days = Number.isNaN(parsedDays) ? 30 : Math.max(1, Math.min(365, parsedDays));
   }
 
   const accountId = req.nextUrl.searchParams.get("accountId");