1 files changed, 1 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 6376a1f5..e0b57380 100644
--- a/setup.py
+++ b/setup.py
@@ -32,6 +32,7 @@ with open(os.path.join(src_dir, "cryptography", "__about__.py")) as f:
 VECTORS_DEPENDENCY = "cryptography_vectors=={0}".format(about['__version__'])
 
 requirements = [
+    "idna",
     "pyasn1",
     "six>=1.4.1",
     "setuptools"