diff --git a/requirements.txt b/requirements.txt
index 23470bf..0047db4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ numpy==1.16.4
 Pillow==6.2.0
 Twisted[tls,http2]==19.2.1
 lxml==4.2.1
-cryptography==2.3
+cryptography==3.2
 asgiref==3.1.2
 cffi==1.11.2
 autobahn==17.9.1