diff --git a/pkgs/development/python-modules/attrs/default.nix b/pkgs/development/python-modules/attrs/default.nix
index e58bf3846dc..c67ad6ece88 100644
--- a/pkgs/development/python-modules/attrs/default.nix
+++ b/pkgs/development/python-modules/attrs/default.nix
@@ -4,11 +4,11 @@
 buildPythonPackage rec {
   name = "${pname}-${version}";
   pname = "attrs";
-  version = "17.2.0";
+  version = "17.4.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "04gx08ikpk26wnq22f7l42gapcvk8iz1512r927k6sadz6cinkax";
+    sha256 = "1c7960ccfd6a005cd9f7ba884e6316b5e430a3f1a6c37c5f87d8b43f83b54ec9";
   };
 
   # macOS needs clang for testing