diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68e56ab..959689c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# v4.0.0 (2022-11-13)
+
+- [changed] Reogranized fetching logic & interface
+
 # v3.0.0 (2022-11-13)
 
 - [changed] Updated fetching logic
diff --git a/WebKitUserAgent.podspec b/WebKitUserAgent.podspec
index c8ebe3c..e95165a 100644
--- a/WebKitUserAgent.podspec
+++ b/WebKitUserAgent.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'WebKitUserAgent'
-  s.version          = '3.0.0'
+  s.version          = '4.0.0'
   s.summary          = 'Conveniently getting the User-Agent through WKWebView'
 
   s.description      = <<-DESC