diff --git a/README.md b/README.md
index dfa89e4..62bb499 100644
--- a/README.md
+++ b/README.md
@@ -30,18 +30,14 @@ Build and install the [Ubuntu Base Box](https://github.com/rgl/ubuntu-vagrant).
 
 Build and install the [Windows Base Box](https://github.com/rgl/windows-2016-vagrant).
 
-Install the required Vagrant plugins:
-
-```bash
-vagrant plugin install vagrant-triggers # see https://github.com/emyl/vagrant-triggers
-```
-
 Add the following entry to your `/etc/hosts` file:
 
 ```
 192.168.56.3 nexus.example.com
 ```
 
+Install Vagrant 2.1+.
+
 Run `vagrant up --provider=virtualbox # or --provider=libvirt` to launch the environment.
 See its output to known how to login at the
 [local Nexus home page](https://nexus.example.com) as `admin` (you can also login with
diff --git a/Vagrantfile b/Vagrantfile
index 08d44b7..5f2d192 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -56,8 +56,9 @@ Vagrant.configure(2) do |config|
     config.vm.provision :shell, path: 'provision/windows/ps.ps1', args: ['use-npm-repository.ps1', nexus_domain]
   end
 
-  config.trigger.before :up, :vm => ['nexus'] do
+  config.trigger.before :up do |trigger|
+    trigger.only_on = 'nexus'
     ldap_ca_cert_path = '../windows-domain-controller-vagrant/tmp/ExampleEnterpriseRootCA.der'
-    run "sh -c 'mkdir -p shared && cp #{ldap_ca_cert_path} shared'" if File.file? ldap_ca_cert_path
+    trigger.run = {inline: "sh -c 'mkdir -p shared && cp #{ldap_ca_cert_path} shared'"} if File.file? ldap_ca_cert_path
   end
 end