diff --git a/setup.py b/setup.py
index 68f82a1d8..8f032b37a 100644
--- a/setup.py
+++ b/setup.py
@@ -71,6 +71,7 @@ setup(
         "hyperframe>=5.0, <6",
         "jsbeautifier>=1.6.3, <1.7",
         "kaitaistruct>=0.7, <0.8",
+        "ldap3>=2.2.0, <2.2.1",
         "passlib>=1.6.5, <1.8",
         "pyasn1>=0.1.9, <0.3",
         "pyOpenSSL>=16.0, <17.1",