diff --git a/pkgs/development/python-modules/openapi-spec-validator/default.nix b/pkgs/development/python-modules/openapi-spec-validator/default.nix
index 1cd95bcd6ab..88455e72610 100644
--- a/pkgs/development/python-modules/openapi-spec-validator/default.nix
+++ b/pkgs/development/python-modules/openapi-spec-validator/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, isPy27, fetchPypi
-, jsonschema, pyyaml, six, pathlib
+, jsonschema, openapi-schema-validator, pyyaml, six, pathlib
 , mock, pytest, pytestcov, pytest-flake8, tox, setuptools }:
 
 buildPythonPackage rec {
@@ -11,7 +11,7 @@ buildPythonPackage rec {
     sha256 = "53ba3d884e98ff2062d5ada025aa590541dcd665b8f81067dc82dd61c0923759";
   };
 
-  propagatedBuildInputs = [ jsonschema pyyaml six setuptools ]
+  propagatedBuildInputs = [ jsonschema openapi-schema-validator pyyaml six setuptools ]
     ++ (lib.optionals (isPy27) [ pathlib ]);
 
   checkInputs = [ mock pytest pytestcov pytest-flake8 tox ];