diff --git a/pkgs/development/libraries/box2d/default.nix b/pkgs/development/libraries/box2d/default.nix
index b8f105fdaf58..102e7bfcc12b 100644
--- a/pkgs/development/libraries/box2d/default.nix
+++ b/pkgs/development/libraries/box2d/default.nix
@@ -3,11 +3,11 @@
 
 stdenv.mkDerivation rec {
   name = "box2d-${version}";
-  version = "2.3.0";
+  version = "2.3.1";
 
   src = fetchurl {
     url = "https://github.com/erincatto/Box2D/archive/v${version}.tar.gz";
-    sha256 = "1dmbswh4x2n5l3c9h0k72m0z4rdpzfy1xl8m8p3rf5rwkvk3bkg2";
+    sha256 = "0llpcifl8zbjbpxdwz87drd01m3lwnv82xb4av6kca1xn4w2gmkm";
   };
 
   sourceRoot = "Box2D-${version}/Box2D";