diff --git a/pkgs/development/tools/continuous-integration/fly/default.nix b/pkgs/development/tools/continuous-integration/fly/default.nix
index bdad33dee74..8497cea01b6 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 = "6.3.0";
+  version = "6.4.0";
 
   src = fetchFromGitHub {
     owner = "concourse";
     repo = "concourse";
     rev = "v${version}";
-    sha256 = "006qkg661hzbc2gpcnpxm09bp1kbb98y0bgdr49bjlnapcmdgr1b";
+    sha256 = "08lw345kzkic5b2dqj3d0d9x1mas9rpi4rdmbhww9r60swj169i7";
   };
 
-  vendorSha256 = "03az7l9rf2syw837zliny82xhkqlad16z0vfcg5h21m3bhz6v6jy";
+  vendorSha256 = "0a78cjfj909ic8wci8id2h5f6r34h90myk6z7m918n08vxv60jvw";
 
   subPackages = [ "fly" ];