diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9f28194d95e..93913bbf54d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4307,11 +4307,11 @@ in {
   cryptography = buildPythonPackage rec {
     # also bump cryptography_vectors
     name = "cryptography-${version}";
-    version = "1.5.1";
+    version = "1.5.3";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/c/cryptography/${name}.tar.gz";
-      sha256 = "1d8da8xbx51m4dqpy51crvcmjakmfcxpx14hh2izppifrh1fs35d";
+      sha256 = "cf82ddac919b587f5e44247579b433224cc2e03332d2ea4d89aa70d7e6b64ae5";
     };
 
     buildInputs = [ pkgs.openssl self.pretend self.cryptography_vectors
@@ -4328,11 +4328,11 @@ in {
   cryptography_vectors = buildPythonPackage rec {
       # also bump cryptography
     name = "cryptography_vectors-${version}";
-    version = "1.5.1";
+    version = "1.5.3";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/c/cryptography-vectors/${name}.tar.gz";
-      sha256 = "1z74mqwlvxlxz6b1xlflphqhgby1k77shl94zw5ncw3x3cqwbccl";
+      sha256 = "e513fecd146a844da19022abd1b4dfbf3335c1941464988f501d7a16f30acdae";
     };
   };