diff --git a/README.md b/README.md
index 7f5fa86..bfad545 100644
--- a/README.md
+++ b/README.md
@@ -18,9 +18,14 @@ playbook relies on Ansible 2.8 or newer, which means you can no longer use
     
     $ source ./ansible_env/bin/activate
     
+    # Make sure that pip will install into our virtualenv
     (ansible_env) $ which pip
     /home/pi/src/git/rpi-ansible/ansible/bin/pip
+
+    # Install ansible and any other requirements
+    (ansible_env) $ pip install -r requirements.txt
     
+    # Run playbook
     (ansible_env) $ sudo $(which ansible-playbook) ./local.yml
 
 ## Configuration
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..9803096
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+python-apt
+ansible>=2.8