diff --git a/src/lib/pdf.ts b/src/lib/pdf.ts
index 3bd5bb8..cb35da1 100644
--- a/src/lib/pdf.ts
+++ b/src/lib/pdf.ts
@@ -12,9 +12,10 @@ export async function pdfToImages(pdfBuffer: Buffer): Promise<PageImage[]> {
   const converter = fromBuffer(pdfBuffer, {
     density: 200,
     format: "jpeg",
-    width: 1600,
+    width: 2200,
     height: 2200,
     quality: 90,
+    preserveAspectRatio: true,
   });
 
   const pageCount = await getPdfPageCount(pdfBuffer);
@@ -23,12 +24,21 @@ export async function pdfToImages(pdfBuffer: Buffer): Promise<PageImage[]> {
   for (let i = 1; i <= pageCount; i++) {
     const result = await converter(i, { responseType: "buffer" });
     if (result.buffer) {
-      const metadata = await sharp(result.buffer).metadata();
+      let buf = result.buffer as Buffer;
+      let meta = await sharp(buf).metadata();
+
+      // Scanners often store landscape content with a PDF /Rotate flag that
+      // pdf2pic may not apply. Detect and rotate to portrait orientation.
+      if ((meta.width || 0) > (meta.height || 0)) {
+        buf = await sharp(buf).rotate(90).jpeg({ quality: 90 }).toBuffer();
+        meta = await sharp(buf).metadata();
+      }
+
       images.push({
         page: i,
-        buffer: result.buffer as Buffer,
-        width: metadata.width || 1600,
-        height: metadata.height || 2200,
+        buffer: buf,
+        width: meta.width || 1600,
+        height: meta.height || 2200,
       });
     }
   }