diff --git a/pkgs/development/tools/continuous-integration/fly/default.nix b/pkgs/development/tools/continuous-integration/fly/default.nix
index d65e3cccf7f..55a4434658f 100644
--- a/pkgs/development/tools/continuous-integration/fly/default.nix
+++ b/pkgs/development/tools/continuous-integration/fly/default.nix
@@ -2,16 +2,16 @@
 
 buildGoModule rec {
   pname = "fly";
-  version = "6.4.0";
+  version = "6.4.1";
 
   src = fetchFromGitHub {
     owner = "concourse";
     repo = "concourse";
     rev = "v${version}";
-    sha256 = "08lw345kzkic5b2dqj3d0d9x1mas9rpi4rdmbhww9r60swj169i7";
+    sha256 = "16si1qm835yyvk2f0kwn9wnk8vpy5q4whgws1s2p6jr7dswg43h8";
   };
 
-  vendorSha256 = "0a78cjfj909ic8wci8id2h5f6r34h90myk6z7m918n08vxv60jvw";
+  vendorSha256 = "0nv9q3j9cja8c6d7ac8fzb8zf82zz1z77f8cxvn3vxjki7fhlavm";
 
   doCheck = false;