diff --git a/README.md b/README.md
index 02bc811b..b5ae6d94 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ Install Golang https://golang.org/doc/install . Because the project uses GoModul
   * Install [libvpx](https://www.webmproject.org/code/), [libopus](http://opus-codec.org/), [pkg-config](https://www.freedesktop.org/wiki/Software/pkg-config/), [sdl2](https://wiki.libsdl.org/Installation)
 ```
 # Ubuntu / Windows (WSL2)
-apt-get install -y pkg-config libvpx-dev libopus-dev libopusfile-dev libsdl2-dev
+apt-get install -y make gcc pkg-config libvpx-dev libopus-dev libopusfile-dev libsdl2-dev
 
 # MacOS
 brew install libvpx pkg-config opus opusfile sdl2
diff --git a/go.mod b/go.mod
index b5ffe410..4ec5798f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/giongto35/cloud-game/v2
 
-go 1.12
+go 1.13
 
 require (
 	cloud.google.com/go v0.67.0 // indirect