diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5441075..b1a09ac 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -8,7 +8,7 @@ enum34>=1.1.6
 jsonrpclib-pelix>=0.2.7
 netaddr==0.7.18
 paramiko>=2.0.1
-cryptography==1.7.1
+cryptography==3.2
 py2chainmap>=0.1.0
 pytest-xdist>=1.11
 PyYAML==3.11