diff --git a/Formula/c/cli11.rb b/Formula/c/cli11.rb
index 98b18261110e8..87560de28d7f9 100644
--- a/Formula/c/cli11.rb
+++ b/Formula/c/cli11.rb
@@ -1,13 +1,13 @@
 class Cli11 < Formula
   desc "Simple and intuitive command-line parser for C++11"
   homepage "https://cliutils.github.io/CLI11/book/"
-  url "https://github.com/CLIUtils/CLI11/archive/refs/tags/v2.3.2.tar.gz"
-  sha256 "aac0ab42108131ac5d3344a9db0fdf25c4db652296641955720a4fbe52334e22"
+  url "https://github.com/CLIUtils/CLI11/archive/refs/tags/v2.4.0.tar.gz"
+  sha256 "d2ce8d5318d2a7a7d1120e2a18caac49cd65423d5d4158cbbc0267e6768af522"
   license "BSD-3-Clause"
   head "https://github.com/CLIUtils/CLI11.git", branch: "master"
 
   bottle do
-    sha256 cellar: :any_skip_relocation, all: "3d5ba7a68bb33ef0ba52b9d8d60cf1cbe3a608def227663bd3d3940ec52c22bd"
+    sha256 cellar: :any_skip_relocation, all: "7688b1e80a07d15c514e081a1cf4d0d1c204668d32fd30556463d7fce5c9f1bf"
   end
 
   depends_on "cmake" => :build