diff --git a/tests/requirements.txt b/tests/requirements.txt
index bbcdc7cc..76e6545d 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -3,7 +3,7 @@ coverage==4.5.1
 Django==1.6.11  # Last version supporting 2.6.
 mock==2.0.0
 pytz==2018.5
-cffi==1.11.2  # Random pin to try and fix pyparser==2.18 not having effect
+cffi==1.14.3  # Random pin to try and fix pyparser==2.18 not having effect
 pycparser==2.18  # Last version supporting 2.6.
 faulthandler==3.1; python_version < '3.3'  # used by testlib
 pytest-catchlog==1.2.2