diff --git a/pkgs/applications/networking/cluster/fluxcd/default.nix b/pkgs/applications/networking/cluster/fluxcd/default.nix
index d7cf0a933df7..22dc5472a14d 100644
--- a/pkgs/applications/networking/cluster/fluxcd/default.nix
+++ b/pkgs/applications/networking/cluster/fluxcd/default.nix
@@ -1,11 +1,11 @@
 { lib, buildGoModule, fetchFromGitHub, fetchzip, installShellFiles }:
 
 let
-  version = "0.13.4";
+  version = "0.15.3";
 
   manifests = fetchzip {
     url = "https://github.com/fluxcd/flux2/releases/download/v${version}/manifests.tar.gz";
-    sha256 = "sha256-+2JvJFzH1CjU/WQ7MLtqd5Adfi/ktX9lPq4IyxPcUD8=";
+    sha256 = "sha256-/uD0hxtTJSr+2tZcwzOIQcEbikHOshWukEBSaK3FiP4=";
     stripRoot = false;
   };
 in
@@ -19,10 +19,10 @@ buildGoModule rec {
     owner = "fluxcd";
     repo = "flux2";
     rev = "v${version}";
-    sha256 = "sha256-edyqxVl8oIwKp/eqFIbu+qn9zhYEnKJKwUbYZ7uxx0I=";
+    sha256 = "sha256-Pyt5BaOawBwyBz7ULzOZr0Fc6bqM5dKn775AylUjDVE=";
   };
 
-  vendorSha256 = "sha256-keIzuqaLppu6+XK3MFiU0en+SVxWVLpfkKEKOAVOz7k=";
+  vendorSha256 = "sha256-17Kbun6Mrip4/XHN5eMHxgnSoX1KuGHwtb8yLTf/Mks=";
 
   nativeBuildInputs = [ installShellFiles ];