diff --git a/README.md b/README.md
index 68a5025..1bbb94e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Command line application template for Scala
 
-Implement CLI application by editing [App.java](src/main/scala/Main.scala)
+Implement CLI application by editing [Main.scala](src/main/scala/Main.scala)
 
 ## How to get input parameters
 You can get arguments as `args` in `main` method.
diff --git a/README_ja.md b/README_ja.md
index b8b9284..134c19b 100644
--- a/README_ja.md
+++ b/README_ja.md
@@ -1,6 +1,6 @@
 # コマンドラインアプリケーション(CLI アプリ)作成用テンプレート(Scala)
 
-[Main.scala](src/main/scala/Main.java)を編集して、CLIアプリを実装してください。  
+[Main.scala](src/main/scala/Main.scala)を編集して、CLIアプリを実装してください。  
 チャレンジ内でファイルの作成が許可されていれば、可読性等のためにファイルを分割する事も可能です。
 
 ## コマンドライン引数の取得方法
diff --git a/build.sbt b/build.sbt
index f4c22b6..a94da1c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ name := """theapp"""
 
 version := "1.0"
 
-scalaVersion := "2.11.8"
+scalaVersion := "2.12.4"
 
 resolvers += Resolver.sonatypeRepo("public")
 enablePlugins(JavaAppPackaging)
diff --git a/cli-template.yml b/cli-template.yml
index de65592..cf87036 100644
--- a/cli-template.yml
+++ b/cli-template.yml
@@ -1,9 +1,13 @@
 build:
-  - sbt stage
+  - sbt -XX:MaxMetaspaceSize=512M stage
 files:
-  - .gitignore
   - build.sbt
   - project/plugins.sbt
   - src/main/scala/Main.scala
 main: src/main/scala/Main.scala
 command: target/universal/stage/bin/theapp
+envConf:
+  imageName: "givery/track-scala-2.12"
+  cacheDirs:
+    - "/root/.ivy2"
+    - "/root/.sbt"
diff --git a/project/plugins.sbt b/project/plugins.sbt
index b0d89ac..44cfb3f 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.1.4")
\ No newline at end of file
+addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.3")