diff --git a/src/components/toast-bar.tsx b/src/components/toast-bar.tsx
index 9cae15a..cc4d8e5 100644
--- a/src/components/toast-bar.tsx
+++ b/src/components/toast-bar.tsx
@@ -36,7 +36,7 @@ const Message = styled('div')`
   justify-content: center;
   margin: 4px 10px;
   color: inherit;
-  flex: 1;
+  flex: 1 1 auto;
 `;
 
 interface ToastBarProps {