diff --git a/doc/sphinx_themes/sphinx_rtd_theme/__init__.py b/doc/sphinx_themes/sphinx_rtd_theme/__init__.py
index 257167e5..3c7e134f 100644
--- a/doc/sphinx_themes/sphinx_rtd_theme/__init__.py
+++ b/doc/sphinx_themes/sphinx_rtd_theme/__init__.py
@@ -12,7 +12,7 @@ from sphinx.locale import _
 from sphinx.util.logging import getLogger
 
 
-__version__ = '2.0.0rc3'
+__version__ = '2.0.0rc5'
 __version_full__ = __version__
 
 logger = getLogger(__name__)
diff --git a/doc/sphinx_themes/sphinx_rtd_theme/layout.html b/doc/sphinx_themes/sphinx_rtd_theme/layout.html
index f3de11ad..c8a30762 100644
--- a/doc/sphinx_themes/sphinx_rtd_theme/layout.html
+++ b/doc/sphinx_themes/sphinx_rtd_theme/layout.html
@@ -28,12 +28,17 @@
     <link rel="stylesheet" href="{{ pathto('_static/' + style, 1) }}" type="text/css" />
     <link rel="stylesheet" href="{{ pathto('_static/pygments.css', 1) }}" type="text/css" />
   {%- endif %}
-  {%- for css in css_files %}
-    {{ css_tag(css) }}
+  {%- for css_file in css_files %}
+    {%- if css_file|attr("filename") %}
+      {{ css_tag(css_file) }}
+    {%- else %}
+      <link rel="stylesheet" href="{{ pathto(css_file, 1)|escape }}" type="text/css" />
+    {%- endif %}
   {%- endfor %}
 
-  {%- for cssfile in extra_css_files %}
-    {{ css_tag(cssfile) }}
+  {# "extra_css_files" is a theme option and it's always a string #}
+  {%- for css_file in extra_css_files %}
+    <link rel="stylesheet" href="{{ pathto(css_file, 1)|escape }}" type="text/css" />
   {%- endfor -%}
 
   {#- FAVICON