diff --git a/setup.py b/setup.py
index f1c2ff1..9555422 100644
--- a/setup.py
+++ b/setup.py
@@ -47,7 +47,7 @@
 
 install_requires = [
     'async-generator==1.10',
-    'pynacl==1.3.0'
+    'pynacl==1.6.2'
 ]
 
 setup_requires = [