diff --git a/pyproject.toml b/pyproject.toml
index d8c2605..959b053 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ include = ["readme.md", "LICENSE.txt"]
 
 [tool.poetry.dependencies]
 python = "~3.6"
+cryptography = "2.7"
 pillar = {path = "../pillar"}
 svn = "~0.3"