diff --git a/libraries/reporters/json_file.rb b/libraries/reporters/json_file.rb
index 5ce172a7..4339b382 100644
--- a/libraries/reporters/json_file.rb
+++ b/libraries/reporters/json_file.rb
@@ -16,7 +16,7 @@ def send_report(report)
 
     def write_to_file(report, path)
       json_file = File.new(path, 'w')
-      json_file.puts(report)
+      json_file.puts(JSON.generate(report))
       json_file.close
     end
   end