diff --git a/.swift-version b/.swift-version
deleted file mode 100644
index bf77d54..0000000
--- a/.swift-version
+++ /dev/null
@@ -1 +0,0 @@
-4.2
diff --git a/.travis.yml b/.travis.yml
index 7ab388c..51faf15 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 os: osx
-osx_image: xcode10
+osx_image: xcode10.2
 language: objective-c
 before_script: 
   - swiftlint --strict
diff --git a/Puree.podspec b/Puree.podspec
index 93c4eb5..da90fad 100644
--- a/Puree.podspec
+++ b/Puree.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "Puree"
-  s.version      = "4.0.2"
+  s.version      = "5.0.0"
   s.summary      = "Awesome log aggregator"
   s.homepage     = "https://github.com/cookpad/Puree-Swift"
   s.license      = { :type => "MIT", :file => "LICENSE" }
@@ -8,4 +8,5 @@ Pod::Spec.new do |s|
   s.platform     = :ios, "10.0"
   s.source       = { :git => "https://github.com/cookpad/Puree-Swift.git", :tag => "#{s.version}" }
   s.source_files  = "Sources/**/*.{h,swift}"
+  s.swift_version = "5.0.0"
 end
diff --git a/Puree.xcodeproj/project.pbxproj b/Puree.xcodeproj/project.pbxproj
index 736806f..dea2985 100644
--- a/Puree.xcodeproj/project.pbxproj
+++ b/Puree.xcodeproj/project.pbxproj
@@ -230,10 +230,10 @@
 				LastUpgradeCheck = 0940;
 				TargetAttributes = {
 					NT_412093004181 = {
-						LastSwiftMigration = 1000;
+						LastSwiftMigration = 1020;
 					};
 					NT_479946421258 = {
-						LastSwiftMigration = 1000;
+						LastSwiftMigration = 1020;
 					};
 				};
 			};
@@ -243,6 +243,7 @@
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = G_8448771205358;
 			projectDirPath = "";
@@ -305,7 +306,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				SDKROOT = iphoneos;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -328,7 +329,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.cookpad.Puree;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
@@ -410,7 +411,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.cookpad.Puree;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
@@ -425,7 +426,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				SDKROOT = iphoneos;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
diff --git a/README.md b/README.md
index 6cec46b..4ef934b 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 ![](Documentation/logo.png)
 
 [![Build Status](https://travis-ci.org/cookpad/Puree-Swift.svg?branch=master)](https://travis-ci.org/cookpad/Puree-Swift)
-[![Language](https://img.shields.io/badge/language-Swift%204.2-orange.svg)](https://swift.org)
+[![Language](https://img.shields.io/badge/language-Swift%205.0-orange.svg)](https://swift.org)
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) 
 [![CocoaPods Compatible](https://img.shields.io/cocoapods/v/Puree.svg)](http://cocoadocs.org/docsets/Puree)
 [![Platform](https://img.shields.io/cocoapods/p/Puree.svg?style=flat)](http://cocoadocs.org/docsets/Puree)
@@ -37,7 +37,7 @@ github "cookpad/Puree-Swift"
 ```ruby
 use_frameworks!
 
-pod 'Puree', '~> 4.0'
+pod 'Puree', '~> 5.0'
 ```
 
 ## Usage
diff --git a/Sources/Puree/LogEntry.swift b/Sources/Puree/LogEntry.swift
index dbb7a68..9c183d1 100644
--- a/Sources/Puree/LogEntry.swift
+++ b/Sources/Puree/LogEntry.swift
@@ -6,8 +6,8 @@ public struct LogEntry: Codable, Hashable {
     public var date: Date
     public var userData: Data?
 
-    public var hashValue: Int {
-        return identifier.hashValue
+    public func hash(into hasher: inout Hasher) {
+        hasher.combine(identifier)
     }
 
     public static func == (lhs: LogEntry, rhs: LogEntry) -> Bool {
diff --git a/Sources/Puree/Output/BufferedOutput.swift b/Sources/Puree/Output/BufferedOutput.swift
index 742c8fd..044aba4 100644
--- a/Sources/Puree/Output/BufferedOutput.swift
+++ b/Sources/Puree/Output/BufferedOutput.swift
@@ -26,8 +26,8 @@ open class BufferedOutput: Output {
             return lhs.logs == rhs.logs
         }
 
-        public var hashValue: Int {
-            return logs.hashValue
+        public func hash(into hasher: inout Hasher) {
+            hasher.combine(logs)
         }
     }
     public struct Configuration {