diff --git a/setup.py b/setup.py
index 4e2ad936..10ce2c62 100755
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ packages = ['requests']
 
 requires = [
     'chardet>=3.0.2,<3.1.0',
-    'idna>=2.5,<2.8',
+    'idna>=2.5,<2.9',
     'urllib3>=1.21.1,<1.25',
     'certifi>=2017.4.17'