diff --git a/pkgs/development/python-modules/gevent/default.nix b/pkgs/development/python-modules/gevent/default.nix
index 09cc5d573db3..a8caf6500162 100644
--- a/pkgs/development/python-modules/gevent/default.nix
+++ b/pkgs/development/python-modules/gevent/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "gevent";
-  version = "1.3.7";
+  version = "1.4.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3f06f4802824c577272960df003a304ce95b3e82eea01dad2637cc8609c80e2c";
+    sha256 = "1eb7fa3b9bd9174dfe9c3b59b7a09b768ecd496debfc4976a9530a3e15c990d1";
   };
 
   buildInputs = [ libev ];