diff --git a/src/utils/exportUtils/exportCSS.ts b/src/utils/exportUtils/exportCSS.ts
index 7f83711fc2..46024590a7 100644
--- a/src/utils/exportUtils/exportCSS.ts
+++ b/src/utils/exportUtils/exportCSS.ts
@@ -133,6 +133,10 @@ const getExportCSS = async (): Promise<string> => {
     white-space: nowrap;
     overflow: hidden;
   }
+
+  .mx_MatrixChat{
+    max_width: 100%;
+  }
 `;
 
     return CSS + customCSS;