diff --git a/src/setup.py b/src/setup.py
index c97478f91..3259165cc 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -112,6 +112,7 @@ setup(
         'vat_moss==0.11.0',
         'django-hijack==2.1.*',
         'django-oauth-toolkit==1.1.*',
+        'idna==2.6',  # required by current requests
     ],
     extras_require={
         'dev': [