diff --git a/nix/requirements_frozen.txt b/nix/requirements_frozen.txt
index d354f21..8c7647d 100644
--- a/nix/requirements_frozen.txt
+++ b/nix/requirements_frozen.txt
@@ -7,7 +7,7 @@ certifi==2019.3.9
 cffi==1.12.3
 chardet==3.0.4
 Click==7.0
-cryptography==2.6.1
+cryptography==3.2
 idna==2.8
 more-itertools==7.0.0
 mypy==0.701