diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c73aef0..f9bb2d8a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,9 +26,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Security in case of vulnerabilities.
 
 ## [Unreleased]
-
+- Nil.
 ---
 
+## [1.11.1] - 2024-10-02
+- Configure regexp timeout in Worldwide#Phone [#290](https://github.com/Shopify/worldwide/pull/290)
+
 ## [1.11.0] - 2024-10-02
 - Add address1_regex to regions [#281](https://github.com/Shopify/worldwide/pull/281)
 - Add address1_regex for BE, CL, MX, ES, IL [#282](https://github.com/Shopify/worldwide/pull/282)
diff --git a/Gemfile.lock b/Gemfile.lock
index 779d681b..fd4af520 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GIT
 PATH
   remote: .
   specs:
-    worldwide (1.11.0)
+    worldwide (1.11.1)
       activesupport (>= 7.0)
       i18n
       phonelib (~> 0.8)
diff --git a/lib/worldwide/phone.rb b/lib/worldwide/phone.rb
index a9775cd6..431af7ea 100644
--- a/lib/worldwide/phone.rb
+++ b/lib/worldwide/phone.rb
@@ -137,14 +137,19 @@ def split_extension(input)
       number = input.downcase
 
       ["ext", "x", ";"].each do |separator|
-        if number.include?(separator)
-          m = number.match(Regexp.new("(?<base>[0-9a-z +-]*)\\s*#{separator}\\.?\\s*(?<ext>.*)"))
-          return [m["base"], m["ext"]] unless m.nil?
-        end
+        next unless number.include?(separator)
+
+        m = number.match(Regexp.new(
+          "(?<base>[0-9a-z +-]*)\\s*#{separator}\\.?\\s*(?<ext>.*)",
+          timeout: 1,
+        ))
+        return [m["base"], m["ext"]] unless m.nil?
       end
 
       # If we get this far, then we have not found an extension, and assume that the full input is just a public number
       [input, nil]
+    rescue Regexp::TimeoutError
+      [input, nil]
     end
 
     # Convert exotic characters to ASCII
diff --git a/lib/worldwide/version.rb b/lib/worldwide/version.rb
index 3110a715..9ed02422 100644
--- a/lib/worldwide/version.rb
+++ b/lib/worldwide/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Worldwide
-  VERSION = "1.11.0"
+  VERSION = "1.11.1"
 end