diff --git a/style/mixins/input.less b/style/mixins/input.less
index d94a703579..a195436809 100644
--- a/style/mixins/input.less
+++ b/style/mixins/input.less
@@ -67,6 +67,7 @@
 
   // Reset height for `textarea`s
   textarea& {
+    max-width: 100%; // prevent textearea resize from coming out of its container
     height: auto;
     vertical-align: bottom;
   }