diff --git a/setup.py b/setup.py
index e16946e78..f1d050650 100755
--- a/setup.py
+++ b/setup.py
@@ -141,7 +141,7 @@ setup(name="authentic2",
           'pillow',
           'tablib',
           'chardet',
-          'attrs',
+          'attrs>17',
           'atomicwrites',
       ],
       zip_safe=False,