diff --git a/pkgs/development/python-modules/pyopenssl/default.nix b/pkgs/development/python-modules/pyopenssl/default.nix
index f3054e3e4dd..035c70f3995 100644
--- a/pkgs/development/python-modules/pyopenssl/default.nix
+++ b/pkgs/development/python-modules/pyopenssl/default.nix
@@ -13,11 +13,11 @@
 
 buildPythonPackage rec {
   pname = "pyOpenSSL";
-  version = "17.5.0";
+  version = "18.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2c10cfba46a52c0b0950118981d61e72c1e5b1aac451ca1bc77de1a679456773";
+    sha256 = "6488f1423b00f73b7ad5167885312bb0ce410d3312eb212393795b53c8caa580";
   };
 
   outputs = [ "out" "dev" ];