diff --git a/python-pytest-httpserver.spec b/python-pytest-httpserver.spec
index ffd91e5..12d1c43 100644
--- a/python-pytest-httpserver.spec
+++ b/python-pytest-httpserver.spec
@@ -38,6 +38,7 @@ BuildRequires:  %{python_module pytest-cov}
 BuildRequires:  %{python_module pytest-runner}
 BuildRequires:  %{python_module requests}
 # /SECTION
+Requires:       python-Werkzeug
 Requires:       python-pytest
 BuildArch:      noarch