diff --git a/public_html/style.css b/public_html/style.css
index e62ecf6..c091464 100644
--- a/public_html/style.css
+++ b/public_html/style.css
@@ -627,6 +627,7 @@ select.error, textarea.error, input.error {
     background-image: url('images/box-empty.png');
     background-repeat: no-repeat;
     background-position: center;
+    background-size: contain;
     cursor: pointer;
 }
 
@@ -771,4 +772,4 @@ select.error, textarea.error, input.error {
     #toggle_sidebar_button.hide_sidebar {
         background-image: url("images/map-icon@3x.png");
     }
-}
\ No newline at end of file
+}