diff --git a/.travis.yml b/.travis.yml
index 06b5ff5..dc3432d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,11 @@
-osx_image: xcode9.4
+osx_image: xcode10.2
 language: objective-c
 env:
   matrix:
     - PLATFORM=iOS SDK=iphonesimulator SCHEME=TrueTime-iOS DESTINATION="platform=iOS Simulator,name=iPhone 6,OS=10.0"
     - PLATFORM=Mac SDK=macosx SCHEME=TrueTime-Mac DESTINATION="platform=macOS"
     - PLATFORM=tvOS SDK=appletvsimulator SCHEME=TrueTime-tvOS DESTINATION="platform=tvOS Simulator,name=Apple TV 1080p,OS=10.0"
-install: 
+install:
   - brew remove swiftlint --force || true
   - brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/8d6cbc8/Formula/swiftlint.rb
   - brew remove carthage --force || true
diff --git a/Sources/HostResolver.swift b/Sources/HostResolver.swift
index 49eb7c0..3437b7d 100644
--- a/Sources/HostResolver.swift
+++ b/Sources/HostResolver.swift
@@ -29,7 +29,6 @@ final class HostResolver {
     /// - parameter callbackQueue: queue to fire `onComplete` callback
     /// - parameter onComplete: invoked upon first successfully resolved host
     ///                         or when all hosts fail
-    // swiftlint:disable:next function_parameter_count
     static func resolve(hosts: [(host: String, port: Int)],
                         timeout: TimeInterval,
                         logger: LogCallback?,
diff --git a/Sources/NTPConnection.swift b/Sources/NTPConnection.swift
index 7bd060b..5dee45f 100644
--- a/Sources/NTPConnection.swift
+++ b/Sources/NTPConnection.swift
@@ -243,7 +243,7 @@ private extension NTPConnection {
                 return
             }
 
-            let packet = data.withUnsafeBytes { $0.pointee as ntp_packet_t }.nativeEndian
+            let packet = data.withUnsafeBytes { $0.load(as: ntp_packet_t.self) }.nativeEndian
             let responseTime = startTime.milliseconds + (responseTicks.milliseconds -
                                                          requestTicks.milliseconds)
 
diff --git a/Sources/SocketAddress.swift b/Sources/SocketAddress.swift
index bf490a2..38a4e22 100644
--- a/Sources/SocketAddress.swift
+++ b/Sources/SocketAddress.swift
@@ -59,8 +59,8 @@ extension SocketAddress: CustomStringConvertible {
 }
 
 extension SocketAddress: Hashable {
-    var hashValue: Int {
-        return host.hashValue
+    func hash(into hasher: inout Hasher) {
+        hasher.combine(host.hashValue)
     }
 }
 
diff --git a/TrueTime.xcodeproj/project.pbxproj b/TrueTime.xcodeproj/project.pbxproj
index 25f590f..b7b86d1 100644
--- a/TrueTime.xcodeproj/project.pbxproj
+++ b/TrueTime.xcodeproj/project.pbxproj
@@ -639,7 +639,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0730;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 1020;
 				ORGANIZATIONNAME = Instacart;
 				TargetAttributes = {
 					280090491D444B64004C788E = {
@@ -1033,6 +1033,7 @@
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_NULLABLE_TO_NONNULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -1065,6 +1066,7 @@
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_NULLABLE_TO_NONNULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -1077,6 +1079,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = "";
+				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OBJC_BRIDGING_HEADER = "";
 				SWIFT_VERSION = 5.0;
diff --git a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-Mac.xcscheme b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-Mac.xcscheme
index 245aea0..b8db222 100644
--- a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-Mac.xcscheme
+++ b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-Mac.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -40,7 +40,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
@@ -70,7 +69,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
diff --git a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-iOS.xcscheme b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-iOS.xcscheme
index b768ca3..dbfd15b 100644
--- a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-iOS.xcscheme
+++ b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-tvOS.xcscheme b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-tvOS.xcscheme
index a64bbb8..caaaba9 100644
--- a/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-tvOS.xcscheme
+++ b/TrueTime.xcodeproj/xcshareddata/xcschemes/TrueTime-tvOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "1020"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,7 +26,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
@@ -56,7 +55,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"