diff --git a/requirements.txt b/requirements.txt
index 3cd896c..ff34399 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ cffi==1.14.0
 chardet==3.0.4
 click==7.1.1
 crc32c==2.0
-cryptography==2.8
+cryptography==3.3.2
 expiringdict==1.2.1
 Flask==1.1.2
 Flask-Cors==3.0.9