diff --git a/brozzler/__init__.py b/brozzler/__init__.py
index 0da5e72..35abfa3 100644
--- a/brozzler/__init__.py
+++ b/brozzler/__init__.py
@@ -139,7 +139,7 @@ def behavior_script(url, template_parameters=None, behaviors_dir=None):
             logger.info(
                 "rendering template",
                 template=behavior["behavior_js_template"],
-                parameters=json.dumps(parameters),
+                parameters=parameters,
                 url=url,
             )
             return script