diff --git a/requirements.txt b/requirements.txt
index 17c1fe97..6a88c2d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 bitstruct==7.1.0
-pynacl==1.3.0
+pynacl==1.5.0
 git+git://github.com/joltwallet/xmodem.git
 cookiecutter==1.6.0
 bumpversion==0.5.3