diff --git a/Vagrantfile b/Vagrantfile
index f935053..5511156 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -5,6 +5,9 @@ $provision_script = <<SCRIPT
 set -ex
 sudo apt-get update && sudo apt-get install -y docker.io
 sudo gpasswd -a vagrant docker
+curl -L https://get.docker.com/ | sh
+docker build -t phantomjs2 - < /vagrant/Dockerfile
+echo "Docker image built."
 SCRIPT
 
 Vagrant.configure(2) do |config|
@@ -12,6 +15,7 @@ Vagrant.configure(2) do |config|
 
   config.vm.provider "virtualbox" do |vb|
     vb.memory = "8192"
+    vb.cpus = 2
   end
 
   config.vm.provision "shell", inline: $provision_script