diff --git a/requirements.txt b/requirements.txt
index 847f20b..7a04a5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,4 @@ flask-mysqldb==0.2.0
 bcrypt == 3.1.7
 requests==2.22.0
 http-ece==1.1.0
-cryptography==2.7
+cryptography==2.8