diff --git a/README.md b/README.md
index 4f108dcce4..ffd6f56e45 100644
--- a/README.md
+++ b/README.md
@@ -7,13 +7,13 @@ Default username is **root** and password is **password**, login address: 192.16
 
 # How to make it
 ## OS require
-Ubuntu 14.04 LTS x86\_64 (16.04 LTS is OK)<br/>
+Ubuntu 18.04 LTS x86\_64 (16.04 LTS is OK)<br/>
 At least 2G RAM & 2 CPU Cores<br/>
 At least 25G HDD<br/>
 
 ## Install the necessary packages 
 ```bash
-sudo apt-get -y install build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib g++-multilib p7zip p7zip-full msmtp libssl-dev texinfo libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint ccache curl wget vim nano python python3 python-pip python3-pip haveged lrzsz
+sudo apt-get -y install build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib g++-multilib p7zip p7zip-full msmtp libssl-dev texinfo libreadline-dev libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint ccache curl wget vim nano python python3 python-pip python3-pip haveged lrzsz
 ```
 
 ## Clone the source
@@ -21,6 +21,7 @@ sudo apt-get -y install build-essential asciidoc binutils bzip2 gawk gettext git
 git clone https://github.com/project-openwrt/openwrt -b master && cd openwrt
 ./scripts/feeds update -a && ./scripts/feeds install -a
 ```
+For developer, you may use `dev` branch instead of `master`.
 
 ## Configure your firmware
 ```bash