diff --git a/src/main.js b/src/main.js
index f1f3baa..5331544 100644
--- a/src/main.js
+++ b/src/main.js
@@ -166,6 +166,7 @@ function clamp(value, min, max) {
 }
 
 function normalizeNumberSetting(value, fallback, { min, max, integer = false } = {}) {
+  if (value === null || value === undefined || (typeof value === 'string' && value.trim() === '')) return fallback;
   const parsed = Number(value);
   if (!Number.isFinite(parsed)) return fallback;
   const rounded = integer ? Math.trunc(parsed) : parsed;