diff --git a/.gitattributes b/.gitattributes
index 6a0e590c10b5e80a2a2a038fac17f247253879a8..206ef7e6642252ac3a632ff25fe19943fd99a050 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1 @@
-Zip/minizip/* linguist-vendored 
\ No newline at end of file
+Zip/minizip/* linguist-vendored 
diff --git a/.swift-version b/.swift-version
index 9f55b2ccb5f234fc6b87ada62389a3d73815d0d1..5186d07068cfed4c3f4705df79c73e115dd35c43 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-3.0
+4.0
diff --git a/.travis.yml b/.travis.yml
index 273f79b4c9144c886a0770d1cee69afd7ff6b08e..0ba04466108cc9deb313bc6d9d0f5d92315f6530 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-osx_image: xcode8
+osx_image: xcode9
 language: objective-c
 env:
   global:
diff --git a/README.md b/README.md
index 7420e5c930689d5d6e38b76640afea37b6173d06..e983f346349ada264f134ac901099024c5f28990 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 
 # Zip
-A Swift 3.0 framework for zipping and unzipping files. Simple and quick to use. Built on top of [minizip](https://github.com/nmoinvaz/minizip).
+A Swift 4.0 framework for zipping and unzipping files. Simple and quick to use. Built on top of [minizip](https://github.com/nmoinvaz/minizip).
 
 ## Usage
 
@@ -60,7 +60,7 @@ Zip.addCustomFileExtension("file-extension-here")
 ### Setting up with [CocoaPods](http://cocoapods.org/?q=Zip)
 ```ruby
 source 'https://github.com/CocoaPods/Specs.git'
-pod 'Zip', '~> 0.8'
+pod 'Zip', '~> 1.0'
 ```
 
 ### Setting up with Carthage
diff --git a/Zip.podspec b/Zip.podspec
index c964bcd48e5326c492dc6f6487f148be3ade35f2..95d4e9db5963f43d4391765edc0b638b4af142f5 100644
--- a/Zip.podspec
+++ b/Zip.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "Zip"
-  s.version          = "0.8.0"
+  s.version          = "1.0.0"
   s.summary          = "Zip and unzip files in Swift."
 
 # This description is used to generate tags and improve search results.
@@ -33,6 +33,8 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = '10.9'
   s.requires_arc = true
 
+  s.pod_target_xcconfig = { 'SWIFT_VERSION' => '4.0' }
+
   s.source_files = 'Zip/*.{swift,h}', 'Zip/minizip/*.{c,h}', 'Zip/minizip/aes/*.{c,h}'
   s.public_header_files = 'Zip/*.h'
   s.pod_target_xcconfig = {'SWIFT_INCLUDE_PATHS' => '$(SRCROOT)/Zip/Zip/minizip/**','LIBRARY_SEARCH_PATHS' => '$(SRCROOT)/Zip/Zip/'}
diff --git a/Zip.xcodeproj/project.pbxproj b/Zip.xcodeproj/project.pbxproj
index 18b44a5ce9cebbc20946223610800ec19a42dbaa..a9e7663ec5fb4431df01fbfd6d55aa375c075c5c 100644
--- a/Zip.xcodeproj/project.pbxproj
+++ b/Zip.xcodeproj/project.pbxproj
@@ -510,7 +510,7 @@
 				"CODE_SIGN_IDENTITY[sdk=appletvos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = "Zip/Info-tvOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
@@ -536,7 +536,7 @@
 				"CODE_SIGN_IDENTITY[sdk=appletvos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = "Zip/Info-tvOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
@@ -559,10 +559,10 @@
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 10;
+				CURRENT_PROJECT_VERSION = 11;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				FRAMEWORK_VERSION = A;
 				INFOPLIST_FILE = Zip/Info.plist;
@@ -582,10 +582,10 @@
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 10;
+				CURRENT_PROJECT_VERSION = 11;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				FRAMEWORK_VERSION = A;
 				INFOPLIST_FILE = Zip/Info.plist;
@@ -659,7 +659,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 10;
+				CURRENT_PROJECT_VERSION = 11;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -717,7 +717,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 10;
+				CURRENT_PROJECT_VERSION = 11;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -749,7 +749,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Zip/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
@@ -772,7 +772,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
-				DYLIB_CURRENT_VERSION = 10;
+				DYLIB_CURRENT_VERSION = 11;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Zip/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
diff --git a/Zip/Info-tvOS.plist b/Zip/Info-tvOS.plist
index 978398e7bbf8437a64bae86ae46d891ed0cc2bc3..e258392291968f5985b4d098a23efcb441d9d7a7 100644
--- a/Zip/Info-tvOS.plist
+++ b/Zip/Info-tvOS.plist
@@ -15,11 +15,11 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.8.0</string>
+	<string>1.0.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>10</string>
+	<string>11</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>
diff --git a/Zip/Info.plist b/Zip/Info.plist
index 978398e7bbf8437a64bae86ae46d891ed0cc2bc3..e258392291968f5985b4d098a23efcb441d9d7a7 100644
--- a/Zip/Info.plist
+++ b/Zip/Info.plist
@@ -15,11 +15,11 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.8.0</string>
+	<string>1.0.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>10</string>
+	<string>11</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>
diff --git a/ZipTests/Info.plist b/ZipTests/Info.plist
index 46af58a1ab8cf91bff40e139a665ad2f81e6dc05..79f71ded3b63f6bbbcc2393765a5879ad5fb5716 100644
--- a/ZipTests/Info.plist
+++ b/ZipTests/Info.plist
@@ -15,10 +15,10 @@
 	<key>CFBundlePackageType</key>
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.8.0</string>
+	<string>1.0.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>10</string>
+	<string>11</string>
 </dict>
 </plist>
diff --git a/build.sh b/build.sh
index e1a3cae100f7cfeb79829bf4dfc3c1276ba86783..a2cb51675d9d6fa1010fcae99e9b6805a0b32eb7 100755
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # **** Update me when new Xcode versions are released! ****
-PLATFORM="platform=iOS Simulator,OS=10.0,name=iPhone 7"
+PLATFORM="platform=iOS Simulator,OS=11.0,name=iPhone 8"
 SDK="iphonesimulator10.0"