diff --git a/APIKit.podspec b/APIKit.podspec
index 908cfadd..7afab61b 100644
--- a/APIKit.podspec
+++ b/APIKit.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = "APIKit"
-  s.version  = "5.2.0"
+  s.version  = "5.3.0"
   s.summary  = "Type-safe networking abstraction layer that associates request type with response type."
   s.homepage = "https://github.com/ishkawa/APIKit"
 
diff --git a/README.md b/README.md
index 9bc26fcb..e6b06ebb 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Session.send(request) { result in
 ## Requirements
 
 - Swift 5.0 or later
-- iOS 8.0 or later
+- iOS 9.0 or later
 - Mac OS 10.10 or later
 - watchOS 2.0 or later
 - tvOS 9.0 or later
diff --git a/Sources/APIKit/Info.plist b/Sources/APIKit/Info.plist
index 10e795d9..2b29ada6 100644
--- a/Sources/APIKit/Info.plist
+++ b/Sources/APIKit/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>5.2.0</string>
+	<string>5.3.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>