diff --git a/setup.py b/setup.py
index 770cb8dad..c9c663c8a 100644
--- a/setup.py
+++ b/setup.py
@@ -71,7 +71,7 @@ setup(
         "h2>=3.2.0,<4",
         "hyperframe>=5.1.0,<6",
         "kaitaistruct>=0.7,<0.9",
-        "ldap3>=2.6.1,<2.8",
+        "ldap3>=2.8,<2.9",
         "msgpack>=1.0.0, <1.1.0",
         "passlib>=1.6.5, <1.8",
         "protobuf>=3.6.0, <3.12",