1 files changed, 1 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 1b1ff608..1ec3a354 100644
--- a/setup.py
+++ b/setup.py
@@ -36,6 +36,7 @@ VECTORS_DEPENDENCY = "cryptography_vectors=={0}".format(about['__version__'])
 requirements = [
     "idna>=2.0",
     "asn1crypto>=0.21.0",
+    "packaging",
     "six>=1.4.1",
     "setuptools>=11.3",
 ]