diff --git a/pkgs/development/python-modules/zeep/default.nix b/pkgs/development/python-modules/zeep/default.nix
index f283479c8de..b14e0226d73 100644
--- a/pkgs/development/python-modules/zeep/default.nix
+++ b/pkgs/development/python-modules/zeep/default.nix
@@ -20,6 +20,7 @@
 , pytestcov
 , requests-mock
 , tornado
+, attrs
 }:
 
 buildPythonPackage rec {
@@ -32,6 +33,7 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [
+    attrs
     appdirs
     cached-property
     defusedxml