diff --git a/app/models/concerns/fluentd/setting/plugin_parameter.rb b/app/models/concerns/fluentd/setting/plugin_parameter.rb
index 5b85e1a..83ee1d2 100644
--- a/app/models/concerns/fluentd/setting/plugin_parameter.rb
+++ b/app/models/concerns/fluentd/setting/plugin_parameter.rb
@@ -162,7 +162,11 @@ class Fluentd
                       else
                         type
                       end
-          Fluent::Config::REFORMAT_VALUE.call(type_name, value.dup)
+          begin
+            Fluent::Config::REFORMAT_VALUE.call(type_name, value.dup)
+          rescue TypeError
+            Fluent::Config::REFORMAT_VALUE.call(type_name, value)
+          end
         end
       end
     end