diff --git a/_themes/bootstrap/layout.html b/_themes/bootstrap/layout.html
index fcd1e76..8243355 100644
--- a/_themes/bootstrap/layout.html
+++ b/_themes/bootstrap/layout.html
@@ -2,7 +2,7 @@
 
 {% set theme_css_files = [
     '_static/css/font-awesome.min.css',
-    '_static/styles.css'
+    '_static/styles.css?v2'
   ]
 %}
 {% set css_files = css_files + theme_css_files %}