diff --git a/optional-dependencies.txt b/optional-dependencies.txt
index a33e5fbe..2a90baa6 100644
--- a/optional-dependencies.txt
+++ b/optional-dependencies.txt
@@ -1,7 +1,7 @@
 clarifai-grpc
 duecredit
 face_recognition
-keras
+keras~=2.10
 python-twitter
 gensim
 google-api-python-client
diff --git a/setup.py b/setup.py
index 200f9090..a0745ca9 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ def read_requirements(req):
     packages=find_packages(exclude=['pliers/tests']),
     license='MIT',
     package_data={'pliers': ['datasets/*'],
-                  'pliers.tests': ['data/*/*']
+                  'pliers.tests': ['data/*/*'],
                   },
     zip_safe=False,
     download_url='https://github.com/psychoinformaticslab/pliers/archive/%s.tar.gz' %