diff --git a/tests/requirements.txt b/tests/requirements.txt
index 446044f..8bbe79d 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -1,7 +1,7 @@
 flake8==3.5.0
 tox==3.4.0
 coverage==4.5.1
-cryptography==2.3.1
+cryptography==3.2
 PyYAML==3.13
 pytest==3.8.1
 pytest-runner==4.2