diff --git a/setup.py b/setup.py
index 32c31f039d5f8c2cd3140f51d8dcb0c5085793d6..fb541eefe6e983f7b65824705b12a8524c49475a 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ setup(
     author="Autistici/Inventati",
     author_email="info@autistici.org",
     url="https://git.autistici.org/ai/authserv",
-    install_requires=["Flask", "python-memcached", "nose"],
+    install_requires=["python-ldap", "Flask", "python-memcached", "nose"],
     setup_requires=[],
     zip_safe=False,
     packages=find_packages(),