diff --git a/requirements.txt b/requirements.txt
index 8d6fc30..3802aa7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 altgraph==0.16.1
 asn1crypto==0.24.0
 cffi
-cryptography==2.7
+cryptography==3.2
 docopt==0.6.2
 fpdf==1.7.2
 future==0.17.1