diff --git a/docs/_plugins/highlight_alt.rb b/docs/_plugins/highlight_alt.rb
index 9d1b414bb7..5b877ee364 100644
--- a/docs/_plugins/highlight_alt.rb
+++ b/docs/_plugins/highlight_alt.rb
@@ -55,7 +55,7 @@ eos
       end
 
       def example(output)
-        "<div class=\"bs-example\" data-example-id=\"#{@options[:id]}\">\n#{output}\n</div>"
+        "<div class=\"bd-example\" data-example-id=\"#{@options[:id]}\">\n#{output}\n</div>"
       end
 
       def render_rouge(code)