diff --git a/12-order-summary-component-thymeleaf/project/plugins.sbt b/12-order-summary-component-thymeleaf/project/plugins.sbt
new file mode 100644
index 0000000..59cd318
--- /dev/null
+++ b/12-order-summary-component-thymeleaf/project/plugins.sbt
@@ -0,0 +1 @@
+addSbtPlugin("io.spray" % "sbt-revolver" % "0.10.0")
diff --git a/12-order-summary-component-thymeleaf/src/main/scala/example/Main.scala b/12-order-summary-component-thymeleaf/src/main/scala/example/Main.scala
index 5006fca..a165924 100644
--- a/12-order-summary-component-thymeleaf/src/main/scala/example/Main.scala
+++ b/12-order-summary-component-thymeleaf/src/main/scala/example/Main.scala
@@ -44,7 +44,7 @@ object Main {
       val templateEngine = new TemplateEngine()
       templateEngine.setTemplateResolver(templateResolver)
 
-      val a = 11234
+      val a = 11
       val context = new Context()
       context.setVariable("name", s"Johny $a")