diff --git a/packages/perseus-editor/src/__stories__/editor-page-with-storybook-preview.tsx b/packages/perseus-editor/src/__stories__/editor-page-with-storybook-preview.tsx
index b2e859b1ec..05166f3edc 100644
--- a/packages/perseus-editor/src/__stories__/editor-page-with-storybook-preview.tsx
+++ b/packages/perseus-editor/src/__stories__/editor-page-with-storybook-preview.tsx
@@ -137,6 +137,7 @@ const styles = StyleSheet.create({
     panel: {
         position: "fixed",
         right: 0,
+        minWidth: 500,
         height: "90vh",
         overflow: "auto",
         flex: "none",