diff --git a/tools/www-generator.py b/tools/www-generator.py
index 89e4e2d3e1..d91db4f1b0 100755
--- a/tools/www-generator.py
+++ b/tools/www-generator.py
@@ -81,7 +81,7 @@ def main():
 
         try:
             output = template.render()
-            soup = BeautifulSoup(output)
+            soup = BeautifulSoup(output, "lxml")
             output = soup.prettify()
         except Exception as e:
             logger.error("rendering template %s failed: %s" %