diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index 52244ae4d961..2771e74e1340 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";
+  version = "2.3.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c132bab45d4bd0fff1d3fe294d92b0a6eb8404e93337b3127bdec9f21de117e6";
+    sha256 = "8d10113ca826a4c29d5b85b2c4e045ffa8bad74fb525ee0eceb1d38d4c70dfd6";
   };
 
   outputs = [ "out" "dev" ];