diff --git a/requirements.txt b/requirements.txt
index 14bf948..447c522 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-cryptography==2.8
+cryptography==3.1.1
 ipdb==0.12.3
 ipython==7.11.1
 pytest==5.3.4