diff --git a/pkgs/applications/version-management/git/default.nix b/pkgs/applications/version-management/git/default.nix
index 375908863a2ab..d7f738adee514 100644
--- a/pkgs/applications/version-management/git/default.nix
+++ b/pkgs/applications/version-management/git/default.nix
@@ -29,7 +29,7 @@ assert sendEmailSupport -> perlSupport;
 assert svnSupport -> perlSupport;
 
 let
-  version = "2.44.1";
+  version = "2.45.1";
   svn = subversionClient.override { perlBindings = perlSupport; };
   gitwebPerlLibs = with perlPackages; [ CGI HTMLParser CGIFast FCGI FCGIProcManager HTMLTagCloud ];
 in
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   src = fetchurl {
     url = "https://www.kernel.org/pub/software/scm/git/git-${version}.tar.xz";
-    hash = "sha256-e2CmJMD3AJoWuFYlBiGq/c3YXrjUS7AgYXtlJbhyYeQ=";
+    hash = "sha256-5k00Co5ieuIs+4vMZRzKC0l88en99SNzVUT/SnMvEr8=";
   };
 
   outputs = [ "out" ] ++ lib.optional withManual "doc";
@@ -374,6 +374,7 @@ stdenv.mkDerivation (finalAttrs: {
       });
       buildbot-integration = nixosTests.buildbot;
     } // tests.fetchgit;
+    updateScript = ./update.sh;
   };
 
   meta = {