diff --git a/requirements.txt b/requirements.txt
index 67e9a84ad..dcf2c6dea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ wget
 plac
 six
 ujson
+cloudpickle
diff --git a/setup.py b/setup.py
index 661b025ee..21f9c6f53 100644
--- a/setup.py
+++ b/setup.py
@@ -163,7 +163,7 @@ def run_setup(exts):
         license="MIT",
         install_requires=['numpy', 'murmurhash', 'cymem >= 1.11', 'preshed >= 0.42',
                           'thinc == 3.3', "text_unidecode", 'wget', 'plac', 'six',
-                          'ujson'],
+                          'ujson', 'cloudpickle'],
         setup_requires=["headers_workaround"],
         cmdclass = {'build_ext': build_ext_subclass },
     )