diff --git a/setup.py b/setup.py
index 3ea766ee..1eed506f 100755
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@
           'numpy',
           'scipy',
           'tqdm',
+          'pillow==5.4.1',
           'scikit-learn>=0.18',
           'scikit-image>=0.12',
       ],