diff --git a/frontend/src/components/PdfPickerModal.tsx b/frontend/src/components/PdfPickerModal.tsx
index 437fde6..fa3b4f4 100644
--- a/frontend/src/components/PdfPickerModal.tsx
+++ b/frontend/src/components/PdfPickerModal.tsx
@@ -121,7 +121,7 @@ export default function PdfPickerModal({
   };
 
   // Build asset URL from key
-  const thumbUrl = (key: string) => `/api/assets/${key}`;
+  const thumbUrl = (key: string) => `/api/images/${key}`;
 
   return (
     <div style={overlayStyle} onClick={onCancel}>