diff --git a/pkgs/by-name/bu/buildkite-agent/package.nix b/pkgs/by-name/bu/buildkite-agent/package.nix
index df452e5c3e13..89ab8a12d59d 100644
--- a/pkgs/by-name/bu/buildkite-agent/package.nix
+++ b/pkgs/by-name/bu/buildkite-agent/package.nix
@@ -14,16 +14,16 @@
 }:
 buildGoModule (finalAttrs: {
   pname = "buildkite-agent";
-  version = "3.89.0";
+  version = "3.121.0";
 
   src = fetchFromGitHub {
     owner = "buildkite";
     repo = "agent";
-    rev = "v${finalAttrs.version}";
-    hash = "sha256-5COo5vXecXLhYAy3bcaYvmluFdfEKGgiTbhat8T3AV8=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-QlslPoLpqzuX05bp58xz/3Vhj0imEqCleO1hhe1PPXM=";
   };
 
-  vendorHash = "sha256-iYc/TWiUFdlgoGB4r/L28yhwQG7g+tBG8usB77JJncM=";
+  vendorHash = "sha256-rv5CqNpjmXhGcZ3KQBX0Z2428upWBUVkdRjEG4QWEoY=";
 
   postPatch = ''
     substituteInPlace clicommand/agent_start.go --replace /bin/bash ${bash}/bin/bash