diff --git a/Formula/f/fluent-bit.rb b/Formula/f/fluent-bit.rb
index a058383d8daa..8f38e9d810b8 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/v3.1.8.tar.gz"
-  sha256 "406868b86f87c2d6c4c633f5e7208f983751539b2d0938dcb4e0103530265f26"
+  url "https://github.com/fluent/fluent-bit/archive/refs/tags/v3.1.9.tar.gz"
+  sha256 "ac3a3e235e7f8a92d35f10c99f400f0b0571417a92e3c4caa467073733d42547"
   license "Apache-2.0"
   head "https://github.com/fluent/fluent-bit.git", branch: "master"
 
@@ -12,12 +12,12 @@ class FluentBit < Formula
   end
 
   bottle do
-    sha256                               arm64_sequoia: "336251073fcf277a2cd459da4ab1e9598dd73417d5b11555f1fd82ad36ed3945"
-    sha256                               arm64_sonoma:  "062ff7da1a23ea6c1a312ba5e5dcdd4c695009e977b0d73bb1e3fe904c12a3ae"
-    sha256                               arm64_ventura: "4af81d4943008d46d9a2ac87da64aafa32ac3bd1e5b4c961781ab76f86bf4609"
-    sha256                               sonoma:        "2b6f2bc8664e95120cdb345b52b35b95c8e77ac08bd2a7c7ba1c877e21d4fad2"
-    sha256                               ventura:       "2d70913ed414aa98c39cf222ed87eccadbca5a51829b2a2ed1f913617aa29304"
-    sha256 cellar: :any_skip_relocation, x86_64_linux:  "787b1d05e5364d63c98bfa0bf377db899444d8c72c4402eccf4720211d479e34"
+    sha256                               arm64_sequoia: "dd1fb712a1217386865d21519c16c660599d62549051577f2fb57e2dfffdfbe6"
+    sha256                               arm64_sonoma:  "0e1cccd1a14f65de292d512e3e31d44475a54703f93a57afd3ea049672c18e33"
+    sha256                               arm64_ventura: "154253ff91d8bd14aa179b6b29f74d1f77037b0c5bb5fb4c368ac81897580b2b"
+    sha256                               sonoma:        "c455f97f48c565c46f9c85377c2ddeb12015e585f6d52a22a73461c0565d8107"
+    sha256                               ventura:       "a806afd738b83a74f007aca70d39995cb4e7260dd5692187610160df12714930"
+    sha256 cellar: :any_skip_relocation, x86_64_linux:  "87237dfaaa0011fefe24188ed671b538ee31e199ccea96e740dfb42fd0879f62"
   end
 
   depends_on "bison" => :build