diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index 603f92336c0..8cfc14a2bee 100644
--- a/pkgs/development/python-modules/cryptography/default.nix
+++ b/pkgs/development/python-modules/cryptography/default.nix
@@ -23,11 +23,11 @@
 buildPythonPackage rec {
   # also bump cryptography_vectors
   pname = "cryptography";
-  version = "2.3.1";
+  version = "2.4.2";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8d10113ca826a4c29d5b85b2c4e045ffa8bad74fb525ee0eceb1d38d4c70dfd6";
+    sha256 = "1pc60dksi9w9mshl6cvn7gdjazbp3pmydy3qp9wgy5wzd8n0b9h5";
   };
 
   outputs = [ "out" "dev" ];
diff --git a/pkgs/development/python-modules/cryptography_vectors/default.nix b/pkgs/development/python-modules/cryptography_vectors/default.nix
index bcb60eb0d8d..d979f03c54d 100644
--- a/pkgs/development/python-modules/cryptography_vectors/default.nix
+++ b/pkgs/development/python-modules/cryptography_vectors/default.nix
@@ -5,13 +5,13 @@
 buildPythonPackage rec {
   # also bump cryptography
   pname = "cryptography_vectors";
-  version = "2.3.1";
+  version = "2.4.2";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bf4d9b61dce69c49e830950aa36fad194706463b0b6dfe81425b9e0bc6644d46";
+    sha256 = "013qx2hz0jv79yzfzpn0r2kk33i5qy3sdnzgwiv5779d18snblwi";
   };
 
   # No tests included
   doCheck = false;
-}
\ No newline at end of file
+}