diff --git a/pkgs/development/libraries/gmp/5.0.4.nix b/pkgs/development/libraries/gmp/5.0.5.nix
similarity index 95%
rename from pkgs/development/libraries/gmp/5.0.4.nix
rename to pkgs/development/libraries/gmp/5.0.5.nix
index 01995d1d885c..3fb625850515 100644
--- a/pkgs/development/libraries/gmp/5.0.4.nix
+++ b/pkgs/development/libraries/gmp/5.0.5.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchurl, m4, cxx ? true }:
 
 stdenv.mkDerivation rec {
-  name = "gmp-5.0.4";
+  name = "gmp-5.0.5";
 
   src = fetchurl {
     url = "mirror://gnu/gmp/${name}.tar.bz2";
-    sha256 = "0vx0z5f1q8jjxjp8hcbcvzz8y41zs889nna4r4ahkpsb7vgamm1m";
+    sha256 = "1jfymbr90mpn0zw5sg001llqnvf2462y77vgjknrmfs1rjn8ln0z";
   };
 
   patches = [ ./ignore-bad-cpuid.patch ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a8fdae521e6d..6938938d9d25 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3679,7 +3679,7 @@ let
       # GMP 4.3.2 is broken on Darwin, so use 4.3.1.
       callPackage ../development/libraries/gmp/4.3.1.nix { }
     else
-      callPackage ../development/libraries/gmp/5.0.4.nix { };
+      callPackage ../development/libraries/gmp/5.0.5.nix { };
 
   gmpxx = appendToName "with-cxx" (gmp.override { cxx = true; });