diff --git a/python-ipywidgets.spec b/python-ipywidgets.spec
index d60d32d..a497bd4 100644
--- a/python-ipywidgets.spec
+++ b/python-ipywidgets.spec
@@ -36,8 +36,8 @@ BuildRequires:  unzip
 Requires:       python-ipykernel >= 4.5.1
 Requires:       python-ipython >= 4
 Requires:       python-jsonschema
-Requires:       python-notebook
 Requires:       python-traitlets >= 4.3.1
+Recommends:     python-notebook
 Provides:       python-jupyter_ipywidgets = %{version}
 Obsoletes:      python-jupyter_ipywidgets <= %{version}
 BuildArch:      noarch