diff --git a/src/components/ExportDialog.tsx b/src/components/ExportDialog.tsx
index d4a7a409..aeffa1cc 100644
--- a/src/components/ExportDialog.tsx
+++ b/src/components/ExportDialog.tsx
@@ -259,7 +259,7 @@ export function ExportDialog({
       />
       {modalIsShown && (
         <Modal
-          maxWidth={640}
+          maxWidth={800}
           onCloseRequest={handleClose}
           labelledBy="export-title"
         >
diff --git a/src/components/Modal.css b/src/components/Modal.css
index 483c1110..77343ce6 100644
--- a/src/components/Modal.css
+++ b/src/components/Modal.css
@@ -26,4 +26,5 @@
   position: relative;
   z-index: 2;
   width: 100%;
+  max-width: 100%;
 }