diff --git a/client/src/templates/Challenges/classic/show.tsx b/client/src/templates/Challenges/classic/show.tsx
index a012a9c3bfce43..9ebb7c610663db 100644
--- a/client/src/templates/Challenges/classic/show.tsx
+++ b/client/src/templates/Challenges/classic/show.tsx
@@ -134,7 +134,7 @@ const BASE_LAYOUT = {
   codePane: { flex: 1 },
   editorPane: { flex: 1 },
   instructionPane: { flex: 1 },
-  previewPane: { flex: 0.7 },
+  previewPane: { flex: 1 },
   notesPane: { flex: 0.7 },
   testsPane: { flex: 0.3 }
 };