diff --git a/python-HyperKitty.changes b/python-HyperKitty.changes
index 3680132..2bb7dff 100644
--- a/python-HyperKitty.changes
+++ b/python-HyperKitty.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Nov 27 13:09:09 UTC 2019 - pgajdos@suse.com
+
+- require rubygem(sass)
+  (https://hyperkitty.readthedocs.io/en/latest/install.html)
+
 -------------------------------------------------------------------
 Thu Nov 14 20:58:30 UTC 2019 - pgajdos@suse.com
 
diff --git a/python-HyperKitty.spec b/python-HyperKitty.spec
index 43ad9c3..6ca0e52 100644
--- a/python-HyperKitty.spec
+++ b/python-HyperKitty.spec
@@ -30,12 +30,12 @@ BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-Django >= 1.11
-Requires:       python-django_compressor >= 1.3
 Requires:       python-django-extensions >= 1.3.7
 Requires:       python-django-gravatar2 >= 1.0.6
 Requires:       python-django-haystack >= 2.8.0
-Requires:       python-django-q >= 1.0.0
 Requires:       python-django-mailman3 >= 1.2.0
+Requires:       python-django-q >= 1.0.0
+Requires:       python-django_compressor >= 1.3
 Requires:       python-djangorestframework >= 3.0.0
 Requires:       python-flufl.lock
 Requires:       python-mailmanclient >= 3.1.1
@@ -43,6 +43,7 @@ Requires:       python-networkx >= 1.9.1
 Requires:       python-python-dateutil >= 2.0
 Requires:       python-pytz >= 2012
 Requires:       python-robot-detection >= 0.3
+Requires:       rubygem(sass)
 BuildArch:      noarch
 # SECTION test requirements
 BuildRequires:  %{python_module Django >= 1.11}