diff --git a/setup.py b/setup.py
index b21925d..79c5a8c 100755
--- a/setup.py
+++ b/setup.py
@@ -81,7 +81,7 @@ setuptools.setup(
         'PyQt5>=5.6.0',
         'Pillow>=5.2.0',
         'psutil>=5.0.0',
-        'python-slugify>=1.2.1',
+        'python-slugify>=1.2.1,<3.0.0',
         'raven>=6.0.0',
     ],
     classifiers=[],