diff --git a/requirements.txt b/requirements.txt
index 6db2cbc..e27a553 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,5 +8,5 @@ bcrypt == 3.1.7
 requests==2.24.0
 http-ece==1.1.0
 pycryptodome==3.9.8
-cryptography==2.9.2
+cryptography==3.1
 pebble==4.5.3