diff --git a/assets/core.styl b/assets/core.styl
index 98f6c7df18..2627359dee 100644
--- a/assets/core.styl
+++ b/assets/core.styl
@@ -72,6 +72,10 @@ resets(arr)
     list-style-type: none
     padding-left: LIST_STYLE_OUTER_WIDTH
     position: relative
+    word-break: break-all
+    @supports (display: contents)
+      > .ql-ui
+        display: contents
     > .ql-ui:before
       display: inline-block
       margin-left: -1*LIST_STYLE_OUTER_WIDTH