diff --git a/requirements.in b/requirements.in
index c475480249cce55d4e56dd7c37842ffbd6f2df8f..6dfaddb1d8bd614ac095756171aca31dd9030f69 100644
--- a/requirements.in
+++ b/requirements.in
@@ -4,6 +4,7 @@ molecule~=2.22.0
 paramiko
 pip
 pip-tools
+python-ldap
 python-vagrant
 setuptools
 sphinx~=1.7.0