diff --git a/pkgs/development/libraries/attr/default.nix b/pkgs/development/libraries/attr/default.nix
index 3c5855ea284f..8d87e2ee50dd 100644
--- a/pkgs/development/libraries/attr/default.nix
+++ b/pkgs/development/libraries/attr/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl, gettext }:
 
 stdenv.mkDerivation rec {
-  name = "attr-2.4.46";
+  name = "attr-2.4.47";
 
   src = fetchurl {
     url = "mirror://savannah/attr/${name}.src.tar.gz";
-    sha256 = "07qf6kb2zk512az481bbnsk9jycn477xpva1a726n5pzlzf9pmnw";
+    sha256 = "0nd8y0m6awc9ahv0ciiwf8gy54c8d3j51pw9xg7f7cn579jjyxr5";
   };
 
   nativeBuildInputs = [ gettext ];