Install wkhtmltopdf on CentOS7

yum install -y libpng
yum install -y libjpeg
yum install -y openssl
yum install -y icu
yum install -y libX11
yum install -y libXext
yum install -y libXrender
yum install -y xorg-x11-fonts-Type1
yum install -y xorg-x11-fonts-75dpi

wget http://download.gna.org/wkhtmltopdf/0.12/0.12.2/wkhtmltox-0.12.2_linux-centos7-amd64.rpm

rpm -Uvh wkhtmltox-0.12.2_linux-centos7-amd64.rpm

---- or ----

wget http://download.gna.org/wkhtmltopdf/0.12/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
unxz wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
tar -xvf wkhtmltox-0.12.4_linux-generic-amd64.tar
mv wkhtmltox/bin/* /usr/local/bin/
rm -rf wkhtmltox
rm -f wkhtmltox-0.12.4_linux-generic-amd64.tar

For the second option, use:

wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz

Thanks @paulsturgess! Maybe you can update your repo with this new url?

First option worked for me! (CentOS)
Do the yum install first! followed by this one below.
-> sudo wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox-0.12.5-1.centos7.x86_64.rpm
lastly, this one.
-> sudo rpm -Uvh wkhtmltox-0.12.5-1.centos7.x86_64.rpm

*you can check your /usr/local/bin the wkhtmltopdf is there :)