diff --git a/core/modules/responsive_image/templates/responsive-image.html.twig b/core/modules/responsive_image/templates/responsive-image.html.twig
index 9354ef7..6e91316 100644
--- a/core/modules/responsive_image/templates/responsive-image.html.twig
+++ b/core/modules/responsive_image/templates/responsive-image.html.twig
@@ -14,7 +14,7 @@
  * @ingroup themeable
  */
 #}
-<picture {{ attributes }} >
+<picture{{ attributes }}>
   {% if sources %}
     {#
     Internet Explorer 9 doesn't recognise source elements that are wrapped in
@@ -22,7 +22,7 @@
     #}
     <!--[if IE 9]><video style="display: none;"><![endif]-->
     {% for source_attributes in sources %}
-      <source {{ source_attributes }} />
+      <source{{ source_attributes }}/>
     {% endfor %}
     <!--[if IE 9]></video><![endif]-->
   {% endif %}