diff --git a/acme/acme/client.py b/acme/acme/client.py
index adc8ad9e3..af52b44ed 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -33,6 +33,7 @@ logger = logging.getLogger(__name__)
 # https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning
 if sys.version_info < (2, 7, 9):  # pragma: no cover
     try:
+        # pylint: disable=no-member
         requests.packages.urllib3.contrib.pyopenssl.inject_into_urllib3()  # type: ignore
     except AttributeError:
         import urllib3.contrib.pyopenssl  # pylint: disable=import-error