diff --git a/requirements.txt b/requirements.txt
index 561ab8d..9be2f76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ cffi==1.11.5
 chardet==3.0.4
 click==6.7
 cryptoconditions==0.6.0.dev1
-cryptography==2.3
+cryptography==3.2
 Flask==1.0.2
 Flask-Cors==3.0.4
 Flask-RESTful==0.3.6