diff --git a/pkgs/by-name/ga/gap/package.nix b/pkgs/by-name/ga/gap/package.nix
index 697a19d6afa1..7fe330e24d71 100644
--- a/pkgs/by-name/ga/gap/package.nix
+++ b/pkgs/by-name/ga/gap/package.nix
@@ -1,6 +1,5 @@
 { stdenv
 , lib
-, fetchpatch
 , fetchurl
 , makeWrapper
 , readline
@@ -67,20 +66,13 @@ in
 stdenv.mkDerivation rec {
   pname = "gap";
   # https://www.gap-system.org/Releases/
-  version = "4.12.2";
+  version = "4.13.1";
 
   src = fetchurl {
     url = "https://github.com/gap-system/gap/releases/download/v${version}/gap-${version}.tar.gz";
-    sha256 = "sha256-ZyMIdF63iiIklO6N1nhu3VvDMUVvzGRWrAZL2yjVh6g=";
+    sha256 = "sha256-l5Tb26b7mY4KLQqoziH8iEitPT+cyZk7C44gvn4dvro=";
   };
 
-  patches = [
-    (fetchpatch {
-      url = "https://github.com/gap-system/gap/commit/c786e229413a44b7462196716b99ae9bb0071f4c.patch";
-      hash = "sha256-g3jrEMSavHAUKlHoPqWmOw49hWHU+29SA788Klnr0Uw=";
-    })
-  ];
-
   # remove all non-essential packages (which take up a lot of space)
   preConfigure = lib.optionalString (!keepAll) (removeNonWhitelistedPkgs packagesToKeep) + ''
     patchShebangs .