diff --git a/src/Annotator.scss b/src/Annotator.scss
index 4b24a5a86..a85eb1c6b 100644
--- a/src/Annotator.scss
+++ b/src/Annotator.scss
@@ -62,6 +62,11 @@
             vertical-align: middle;
         }
     }
+
+    @media #{$mobile} {
+        margin-left: 0;
+        margin-right: 0;
+    }
 }
 
 //------------------------------------------------------------------------------