diff --git a/ci/requirements.txt b/ci/requirements.txt
index 456b2b7..fcd67d5 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -1 +1,2 @@
 ansible-core==2.18.11
+passlib==1.7.4
diff --git a/roles/users/README.md b/roles/users/README.md
index 90f8563..30fd61c 100644
--- a/roles/users/README.md
+++ b/roles/users/README.md
@@ -18,9 +18,15 @@ Check out [corvus-migratorius/ansible-disk-quotas](https://github.com/corvus-mig
 Requirements
 ------------
 
+Target node:
+
 - systemd
 - openssh
 
+Controller:
+
+- `passlib` (for working with user passwords)
+
 Role Variables
 --------------