diff --git a/.hound.yml b/.hound.yml
index c2b241e..d659195 100644
--- a/.hound.yml
+++ b/.hound.yml
@@ -1,2 +1,2 @@
 swift:
-  config_file: .swiftlint.yml
\ No newline at end of file
+  config_file: .swiftlint.yml
diff --git a/.swift-version b/.swift-version
index bf77d54..a75b92f 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.2
+5.1
diff --git a/.swiftlint.yml b/.swiftlint.yml
index cdd74ee..79142f5 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -1,33 +1,33 @@
 opt_in_rules:
-- trailing_newline
+  - trailing_newline
 
 disabled_rules:
-- trailing_whitespace
-- type_name
-- force_cast
-- type_body_length
-- file_length
-- cyclomatic_complexity
-- valid_docs
-- missing_docs
-- opening_brace
-- line_length
-- force_try
-- identifier_name
+  - trailing_whitespace
+  - type_name
+  - force_cast
+  - type_body_length
+  - file_length
+  - cyclomatic_complexity
+  - valid_docs
+  - missing_docs
+  - opening_brace
+  - line_length
+  - force_try
+  - identifier_name
 
 force_try: warning
 
 line_length: 150
 
 excluded:
-- Pods
-- Carthage
-- PDFGeneratorTests
+  - Pods
+  - Carthage
+  - PDFGeneratorTests
 
 function_body_length:
-- 100 # warning
-- 300 # error
+  - 100 # warning
+  - 300 # error
 
 function_parameter_count:
-- 5 #warning
-- 10 #error
+  - 5 #warning
+  - 10 #error
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fbbd9f..39538a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 #Change Log
 
+## [v3.1.0]
+### Updated
+- WKWebView + Xcode 11.2.1 Updates (#117)
+
+Special thanks!! **@rlester**
+
+## [v3.0.0]
+
+.
+
 ## [v2.1](https://github.com/sgr-ksmt/PDFGenerator/releases/tag/2.1) (2017/09/21)
 ### Updated
 - Update project to xcode9 and swift4 (#79)
@@ -7,7 +17,7 @@
 ### Fixed
 - Cleanup (#77)
 
-Special thanks!!  **wesbillman** , **russellbstephens**
+Special thanks!!  **@wesbillman** , **@russellbstephens**
 
 
 ## [v2.0.1](https://github.com/sgr-ksmt/PDFGenerator/releases/tag/2.0.1) (2016/09/19)
diff --git a/PDFGenerator.podspec b/PDFGenerator.podspec
index 039cbad..aa6c152 100644
--- a/PDFGenerator.podspec
+++ b/PDFGenerator.podspec
@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
   s.author           = { 'Suguru Kishimoto' => 'melodydance.k.s@gmail.com' }
   s.source           = { git: 'https://github.com/sgr-ksmt/PDFGenerator.git', tag: s.version.to_s }
   s.platform         = :ios, '8.0'
-  s.swift_version = '4.2'
+  s.swift_version = '5.1'
   s.source_files = 'PDFGenerator/**/*.{swift,h}'
   s.frameworks = 'WebKit'
 end