diff --git a/requirements.txt b/requirements.txt
index f2c8f66d86b..e63a82f2065 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # generated from manifests external_dependencies
 chardet
-cryptography
+cryptography==2.6.1
 pycountry
 pycryptodome
 qrcode