diff --git a/README.md b/README.md
index 62f7527..d7a8838 100644
--- a/README.md
+++ b/README.md
@@ -206,7 +206,7 @@ $ tox -v
 git clone https://github.com/ansible-community/molecule-hetznercloud.git
 cd molecule-hetznercloud
 python3 -m venv .venv && source .venv/bin/activate
-pip install -e . "ansible<4"
+pip install -e . "ansible<4" netaddr
 export INSTANCE_UUID=$(openssl rand -hex 5)
 export HCLOUD_TOKEN=YOURKEY
 cd integration && molecule test