diff --git a/requirements.txt b/requirements.txt
index 17c0477..885b0b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ certifi==2017.4.17
 cffi==1.10.0
 chardet==3.0.4
 click==6.7
-cryptography==1.7.2
+cryptography==3.2
 Cython==0.26
 enum34==1.1.6
 Eve==0.7.4