diff --git a/src/hooks/useSubscription.js b/src/hooks/useSubscription.js
index 34ebc9b..88474e7 100644
--- a/src/hooks/useSubscription.js
+++ b/src/hooks/useSubscription.js
@@ -8,7 +8,7 @@ const LS_KEY = "quickpdf_usage";
 const USERS  = "users";
 
 function getLocalUsage() {
-  const n = parseInt(localStorage.getItem(LS_KEY), 10);
+  const n = parseInt(localStorage.getItem(LS_KEY, 10), 10);
   return isNaN(n) ? 0 : n;
 }
 
diff --git a/src/pages/Home/components/VisitorBadge.jsx b/src/pages/Home/components/VisitorBadge.jsx
index f36dee6..474f6f3 100644
--- a/src/pages/Home/components/VisitorBadge.jsx
+++ b/src/pages/Home/components/VisitorBadge.jsx
@@ -70,7 +70,7 @@ function OdometerDisplay({ value }) {
             ,
           </span>
         ) : (
-          <Reel key={i} digit={parseInt(char)} />
+          <Reel key={i} digit={parseInt(char, 10)} />
         )
       )}
     </div>
diff --git a/src/pages/PageNumbers/PageNumbers.jsx b/src/pages/PageNumbers/PageNumbers.jsx
index 601b7ea..f5cc413 100644
--- a/src/pages/PageNumbers/PageNumbers.jsx
+++ b/src/pages/PageNumbers/PageNumbers.jsx
@@ -157,7 +157,7 @@ export function PageNumbers() {
             <div>
               <label className="block text-xs text-zinc-500 uppercase tracking-widest font-semibold mb-3">Position</label>
               <div className="grid grid-cols-3 gap-2">
-                {POSITIONS.map(({ value, label }) => (
+                {(POSITIONS ?? []).map(({ value, label }) => (
                   <button
                     key={value}
                     onClick={() => setPosition(value)}
@@ -216,7 +216,7 @@ export function PageNumbers() {
                   value={startNumber}
                   min={0}
                   max={9999}
-                  onChange={(e) => setStartNumber(Math.max(0, parseInt(e.target.value) || 0))}
+                  onChange={(e) => setStartNumber(Math.max(0, parseInt(e.target.value, 10) || 0))}
                   className="w-full h-11 px-4 bg-zinc-900/60 border border-white/10 rounded-xl text-sm text-white focus:outline-none focus:border-white/30 transition-colors"
                 />
               </div>
diff --git a/src/pages/Split/Split.jsx b/src/pages/Split/Split.jsx
index 0df4eac..b437a9a 100644
--- a/src/pages/Split/Split.jsx
+++ b/src/pages/Split/Split.jsx
@@ -56,7 +56,7 @@ export function Split() {
     try {
       setIsProcessing(true);
       setError(null);
-      const splitBlob = await splitPdf(file, parseInt(range.start), parseInt(range.end));
+      const splitBlob = await splitPdf(file, parseInt(range.start, 10), parseInt(range.end, 10));
       const url = URL.createObjectURL(splitBlob);
       const link = document.createElement("a");
       link.href = url;
diff --git a/src/pages/Watermark/Watermark.jsx b/src/pages/Watermark/Watermark.jsx
index 22574e5..35979f3 100644
--- a/src/pages/Watermark/Watermark.jsx
+++ b/src/pages/Watermark/Watermark.jsx
@@ -258,7 +258,7 @@ export function Watermark() {
                   {watermarkMode === "text" && (
                     <div className="space-y-2">
                       <label className="text-xs text-zinc-500 uppercase">Size: {options.fontSize}px</label>
-                      <input type="range" min="10" max="200" value={options.fontSize} onChange={(e) => updateOption("fontSize", parseInt(e.target.value))} className="w-full h-1.5 bg-zinc-800 rounded-lg appearance-none cursor-pointer accent-white" />
+                      <input type="range" min="10" max="200" value={options.fontSize} onChange={(e) => updateOption("fontSize", parseInt(e.target.value, 10))} className="w-full h-1.5 bg-zinc-800 rounded-lg appearance-none cursor-pointer accent-white" />
                     </div>
                   )}
                   {watermarkMode === "image" && (
@@ -278,7 +278,7 @@ export function Watermark() {
 
                 <div className="space-y-2">
                   <label className="text-xs text-zinc-500 uppercase">Rotation: {options.rotation}°</label>
-                  <input type="range" min="-90" max="90" value={options.rotation} onChange={(e) => updateOption("rotation", parseInt(e.target.value))} className="w-full h-1.5 bg-zinc-800 rounded-lg appearance-none cursor-pointer accent-white" />
+                  <input type="range" min="-90" max="90" value={options.rotation} onChange={(e) => updateOption("rotation", parseInt(e.target.value, 10))} className="w-full h-1.5 bg-zinc-800 rounded-lg appearance-none cursor-pointer accent-white" />
                 </div>
 
                 <div className="grid grid-cols-2 gap-4">
@@ -287,7 +287,7 @@ export function Watermark() {
                     <input
                       type="number"
                       value={options.offsetX}
-                      onChange={(e) => updateOption("offsetX", parseInt(e.target.value) || 0)}
+                      onChange={(e) => updateOption("offsetX", parseInt(e.target.value, 10) || 0)}
                       className="w-full h-10 px-3 bg-black border border-white/10 text-white rounded-lg outline-none focus:ring-1 focus:ring-white/20"
                     />
                   </div>
@@ -296,7 +296,7 @@ export function Watermark() {
                     <input
                       type="number"
                       value={options.offsetY}
-                      onChange={(e) => updateOption("offsetY", parseInt(e.target.value) || 0)}
+                      onChange={(e) => updateOption("offsetY", parseInt(e.target.value, 10) || 0)}
                       className="w-full h-10 px-3 bg-black border border-white/10 text-white rounded-lg outline-none focus:ring-1 focus:ring-white/20"
                     />
                   </div>