diff --git a/blockchain_datacraw/requirements.txt b/blockchain_datacraw/requirements.txt
index afaa133..ac54d18 100644
--- a/blockchain_datacraw/requirements.txt
+++ b/blockchain_datacraw/requirements.txt
@@ -25,7 +25,7 @@ clyent==1.2.2
 colorama==0.3.9
 comtypes==1.1.4
 contextlib2==0.5.5
-cryptography==2.2.2
+cryptography==3.2
 cycler==0.10.0
 Cython==0.28.2
 cytoolz==0.9.0.1