diff --git a/README.rst b/README.rst
index f526f2727..c21b7a0b3 100644
--- a/README.rst
+++ b/README.rst
@@ -35,7 +35,7 @@ Required Prerequisites
 ======================
 
 * Python 3.7+
-* cryptography >= 2.5.0
+* cryptography >= 3.4.6
 * boto3 >= 1.10.0
 * attrs
 
diff --git a/requirements.txt b/requirements.txt
index 2f4323845..506801993 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 boto3>=1.10.0
-cryptography>=3.4.0
+cryptography>=3.4.6
 attrs>=17.4.0
 wrapt>=1.10.11