diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 54ecc374b35..ff991be6dd7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3633,11 +3633,11 @@ in modules // {
 
   cryptography = buildPythonPackage rec {
     # also bump cryptography_vectors
-    name = "cryptography-1.1.1";
+    name = "cryptography-1.2.3";
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/c/cryptography/${name}.tar.gz";
-      sha256 = "1q5snbnn2am85zb5jrnxwzncl4kwa11740ws8g9b4ps5ywx944i9";
+      sha256 = "0kj511z4g21fhcr649pyzpl0zzkkc7hsgxxjys6z8wwfvmvirccf";
     };
 
     buildInputs = [ pkgs.openssl self.pretend self.cryptography_vectors
@@ -3653,11 +3653,11 @@ in modules // {
 
   cryptography_vectors = buildPythonPackage rec {
       # also bump cryptography
-    name = "cryptography_vectors-1.1.1";
+    name = "cryptography_vectors-1.2.3";
 
     src = pkgs.fetchurl {
       url = "https://pypi.python.org/packages/source/c/cryptography-vectors/${name}.tar.gz";
-      sha256 = "17gi301p3wi39dr4dhrmpfflid3k004jp9cnvdp46b7p5lm6hb3w";
+      sha256 = "0shawgpax79gvjrj0a313sll9gaqys7q1hxngn6j4k24lmz7bwki";
     };
   };