diff --git a/Composer/packages/client/src/pages/design/styles.js b/Composer/packages/client/src/pages/design/styles.js
index 52a58396da..d957313784 100644
--- a/Composer/packages/client/src/pages/design/styles.js
+++ b/Composer/packages/client/src/pages/design/styles.js
@@ -78,7 +78,7 @@ export const visualEditor = css`
 `;
 
 export const formEditor = css`
-  max-width: 600px;
+  max-width: 400px;
   flex: 1;
   border: 0px;
   transition: width 0.2s ease-in-out;