diff --git a/pkgs/by-name/ra/radicale/package.nix b/pkgs/by-name/ra/radicale/package.nix
index 974521ea44f0b..cba1ab45c9a48 100644
--- a/pkgs/by-name/ra/radicale/package.nix
+++ b/pkgs/by-name/ra/radicale/package.nix
@@ -30,6 +30,7 @@ python3.pkgs.buildPythonApplication rec {
       pika
       python-dateutil
       pytz # https://github.com/Kozea/Radicale/issues/816
+      ldap3
     ]
     ++ passlib.optional-dependencies.bcrypt;