diff --git a/requirements.txt b/requirements.txt
index a35db94..13a52f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ cffi==1.11.5
 chardet==3.0.4
 click==6.7
 contextlib2==0.5.5
-cryptography==2.3.1
+cryptography==3.3.2
 cyordereddict==0.2.2
 Cython==0.28.5
 decorator==4.4.0