diff --git a/HISTORY.rst b/HISTORY.rst
index 1c107309..de6ba5c4 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -10,6 +10,10 @@ dev
 
 **Bugfixes**
 
+**Dependencies**
+
+- We now support idna v2.6.
+
 2.18.3 (2017-08-02)
 +++++++++++++++++++
 
diff --git a/setup.py b/setup.py
index 98702858..25887bb3 100755
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ packages = ['requests']
 
 requires = [
     'chardet>=3.0.2,<3.1.0',
-    'idna>=2.5,<2.6',
+    'idna>=2.5,<2.7',
     'urllib3>=1.21.1,<1.23',
     'certifi>=2017.4.17'