diff --git a/pkgs/development/python-modules/greenlet/default.nix b/pkgs/development/python-modules/greenlet/default.nix
index 9d00e93739c..58fcad44004 100644
--- a/pkgs/development/python-modules/greenlet/default.nix
+++ b/pkgs/development/python-modules/greenlet/default.nix
@@ -8,12 +8,12 @@
 
 buildPythonPackage rec {
   pname = "greenlet";
-  version = "0.4.17";
+  version = "1.0.0";
   disabled = isPyPy;  # builtin for pypy
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0swdhrcq13bdszv3yz5645gi4ijbzmmhxpb6whcfg3d7d5f87n21";
+    sha256 = "719e169c79255816cdcf6dccd9ed2d089a72a9f6c42273aae12d55e8d35bdcf8";
   };
 
   propagatedBuildInputs = [ six ];