diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -55,7 +55,9 @@ setup(
         'pytest-cov',
         'pycodestyle',
         'pytest-flake8',
-        'pytest-mypy>=0.4.0'
+        'pytest-mypy>=0.4.0',
+        # see https://github.com/python/importlib_metadata/issues/259
+        'importlib-metadata==2.1.0'
     ],
     extras_require={
         'dev':  ['yapf', 'isort'],
Try to fix CI on Python <I>