diff --git a/requirements.txt b/requirements.txt
index 958a068..6cf6037 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ chardet==3.0.4
 click==6.7
 coverage==4.5.1
 coveralls==1.3.0
-cryptography==1.9
+cryptography==3.2
 docopt==0.6.2
 Flask==0.12.2
 Flask-API==1.0