diff --git a/Formula/f/fluent-bit.rb b/Formula/f/fluent-bit.rb
index b10412f719e96..785526b51daf9 100644
--- a/Formula/f/fluent-bit.rb
+++ b/Formula/f/fluent-bit.rb
@@ -1,8 +1,8 @@
 class FluentBit < Formula
   desc "Fast and Lightweight Logs and Metrics processor"
   homepage "https://github.com/fluent/fluent-bit"
-  url "https://github.com/fluent/fluent-bit/archive/refs/tags/v4.0.3.tar.gz"
-  sha256 "c7d276238d25242467218941842d8cd4df6cfa52cc9379ae5755220cdefd1dc1"
+  url "https://github.com/fluent/fluent-bit/archive/refs/tags/v4.0.4.tar.gz"
+  sha256 "591037d249d9058e69d83e94a47cb507fa423f0c7d4df202229a01da4996407b"
   license "Apache-2.0"
   head "https://github.com/fluent/fluent-bit.git", branch: "master"
 
@@ -12,13 +12,13 @@ class FluentBit < Formula
   end
 
   bottle do
-    sha256 cellar: :any,                 arm64_sequoia: "aee19e6bcc47e7a7ccd3916aa705226cd6ac9e20bcaedd86f5f962c49f88c93a"
-    sha256 cellar: :any,                 arm64_sonoma:  "7e09a3cc8d3b15650adb3d7c4af971842d0febe485d98a72cb339f1f28399e30"
-    sha256 cellar: :any,                 arm64_ventura: "fa7dc4f37309e141cb113605834ec4ecce89178c58ad02088a8f64292e593a80"
-    sha256 cellar: :any,                 sonoma:        "727f7263cac717ce8645a406ebce75d37f8a03df2e118044bfd08caa0b0ea24a"
-    sha256 cellar: :any,                 ventura:       "35e7de0cf69653efe8b2d8adb4a96bf0209418b3628d6cbe02be8b94a098779e"
-    sha256 cellar: :any_skip_relocation, arm64_linux:   "66fe3e628b4c7bc6919583e3c143ee21961f89a3b898d4b885708489a0a87156"
-    sha256 cellar: :any_skip_relocation, x86_64_linux:  "ceec22065d8b1b4949feece04ee97f83088ab71dc882de1c637d50bd7911ce6a"
+    sha256 cellar: :any,                 arm64_sequoia: "d3f78c7885249f5b9b9709467f69efc9a8e6af287f801c904045fe4c1a26a293"
+    sha256 cellar: :any,                 arm64_sonoma:  "651c4d4700883c50181d85e723a551b8950871d09d71f31a83561ec0a38ac4b5"
+    sha256 cellar: :any,                 arm64_ventura: "01410e495acc244d67a788c0481732afabea60b31689fdafa1e2cadb9c9ab277"
+    sha256 cellar: :any,                 sonoma:        "cdaded4f81953c85c9ab646bcadcffd982ae77c8a6f0f1fad77eab48380b3bf7"
+    sha256 cellar: :any,                 ventura:       "9fc4cb7c04e3d08323a20ed828ec222220138898246a48bc8d0523b3369801d0"
+    sha256 cellar: :any_skip_relocation, arm64_linux:   "0009f4132a5a4893bd997c8920ca1d36258fd42310767cfc06863bfaa73b7438"
+    sha256 cellar: :any_skip_relocation, x86_64_linux:  "302c705cc373a70c1ee684b68d206a25974a1f8732bd7d1d9556df7bb459abb6"
   end
 
   depends_on "bison" => :build