diff --git a/pkgs/development/libraries/glpk/default.nix b/pkgs/development/libraries/glpk/default.nix
index 2b1a5b571ef0..d4ff7d9603f6 100644
--- a/pkgs/development/libraries/glpk/default.nix
+++ b/pkgs/development/libraries/glpk/default.nix
@@ -1,11 +1,11 @@
 { fetchurl, stdenv }:
 
 stdenv.mkDerivation rec {
-  name = "glpk-4.52.1";
+  name = "glpk-4.56";
 
   src = fetchurl {
     url = "mirror://gnu/glpk/${name}.tar.gz";
-    sha256 = "0nz9ngmx23c8gbjr8l8ygnfaanxj2mwbl8awpg630bgrkxdnhc9j";
+    sha256 = "0syzix6qvpn0fzp08c84c8snansf1cam5vd0dk2w91mz2c85d18h";
   };
 
   doCheck = true;