diff --git a/pyproject.toml b/pyproject.toml
index bce1708f..3ac12acc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ python = "^3.6"
 colorlog = "4.0.2"
 sawtooth-sdk = "1.1.3"
 sawtooth-signing = "1.1.3"
-cryptography = "2.5"
+cryptography = "2.7"
 protobuf = "3.6.1"
 requests = "2.21.0"
 pyOpenSSL = "18.0.0"