diff --git a/.travis.yml b/.travis.yml
index fca5353..74a8275 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: objective-c
 
 os: osx
-osx_image: xcode9.3
+osx_image: xcode10.1
 
 sudo: false # Enable container-based builds
 
diff --git a/Cartfile b/Cartfile
index 32a661f..e9bc3ad 100644
--- a/Cartfile
+++ b/Cartfile
@@ -1 +1 @@
-github "antitypical/Result" ~> 3.0
+github "antitypical/Result" ~> 4.0
diff --git a/Cartfile.private b/Cartfile.private
index 8c4fe0d..da3abe3 100644
--- a/Cartfile.private
+++ b/Cartfile.private
@@ -1,4 +1,4 @@
-github "jspahrsummers/xcconfigs" >= 0.10
-github "Quick/Quick" ~> 1.0
-github "Quick/Nimble" ~> 7.0
-github "ZipArchive/ZipArchive" ~> 1.6
+github "jspahrsummers/xcconfigs" ~> 0.12
+github "Quick/Quick" ~> 2.0
+github "Quick/Nimble" ~> 8.0
+github "ZipArchive/ZipArchive" ~> 2.0
diff --git a/Cartfile.resolved b/Cartfile.resolved
index 6131837..6df61af 100644
--- a/Cartfile.resolved
+++ b/Cartfile.resolved
@@ -1,5 +1,5 @@
-github "Quick/Nimble" "v7.0.3"
-github "Quick/Quick" "v1.2.0"
-github "ZipArchive/ZipArchive" "v1.8.1"
-github "antitypical/Result" "3.2.4"
-github "jspahrsummers/xcconfigs" "0.10"
+github "Quick/Nimble" "v8.0.1"
+github "Quick/Quick" "v2.0.0"
+github "ZipArchive/ZipArchive" "v2.1.5"
+github "antitypical/Result" "4.1.0"
+github "jspahrsummers/xcconfigs" "0.12"
diff --git a/Carthage/Checkouts/Nimble b/Carthage/Checkouts/Nimble
index 22800b0..43304bf 160000
--- a/Carthage/Checkouts/Nimble
+++ b/Carthage/Checkouts/Nimble
@@ -1 +1 @@
-Subproject commit 22800b0954c89344bb8c87f8ab93378076716fb7
+Subproject commit 43304bf2b1579fd555f2fdd51742771c1e4f2b98
diff --git a/Carthage/Checkouts/Quick b/Carthage/Checkouts/Quick
index 0ff81f2..0b4ed6c 160000
--- a/Carthage/Checkouts/Quick
+++ b/Carthage/Checkouts/Quick
@@ -1 +1 @@
-Subproject commit 0ff81f2c665b4381f526bd656f8708dd52a9ea2f
+Subproject commit 0b4ed6c706dd0cce923b5019a605a9bcc6b1b600
diff --git a/Carthage/Checkouts/Result b/Carthage/Checkouts/Result
index 7477584..2ca499b 160000
--- a/Carthage/Checkouts/Result
+++ b/Carthage/Checkouts/Result
@@ -1 +1 @@
-Subproject commit 7477584259bfce2560a19e06ad9f71db441fff11
+Subproject commit 2ca499ba456795616fbc471561ff1d963e6ae160
diff --git a/Carthage/Checkouts/ZipArchive b/Carthage/Checkouts/ZipArchive
index 92f3cac..6017bab 160000
--- a/Carthage/Checkouts/ZipArchive
+++ b/Carthage/Checkouts/ZipArchive
@@ -1 +1 @@
-Subproject commit 92f3cac49f7b70fc1466d681ac0e13ff91cf7898
+Subproject commit 6017baba3cd7f5563a23aee865d08bc26e338bd1
diff --git a/Carthage/Checkouts/xcconfigs b/Carthage/Checkouts/xcconfigs
index cc451b0..bb79555 160000
--- a/Carthage/Checkouts/xcconfigs
+++ b/Carthage/Checkouts/xcconfigs
@@ -1 +1 @@
-Subproject commit cc451b08e052b6146f5caf66bc1120420c529c7b
+Subproject commit bb795558a76e5daf3688500055bbcfe243bffa8d
diff --git a/SwiftGit2.xcodeproj/project.pbxproj b/SwiftGit2.xcodeproj/project.pbxproj
index 76f2dcb..20af11b 100644
--- a/SwiftGit2.xcodeproj/project.pbxproj
+++ b/SwiftGit2.xcodeproj/project.pbxproj
@@ -597,22 +597,22 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0720;
-				LastUpgradeCheck = 0810;
+				LastUpgradeCheck = 1010;
 				ORGANIZATIONNAME = "GitHub, Inc";
 				TargetAttributes = {
 					621E66611C72958800A0F352 = {
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 1010;
 					};
 					621E66B61C72958D00A0F352 = {
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 1010;
 					};
 					BEB31F221A0D6F7A00F525B9 = {
 						CreatedOnToolsVersion = 6.1;
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 1010;
 					};
 					BEB31F2D1A0D6F7A00F525B9 = {
 						CreatedOnToolsVersion = 6.1;
-						LastSwiftMigration = 0810;
+						LastSwiftMigration = 1010;
 					};
 					BEB31F8E1A0E563900F525B9 = {
 						CreatedOnToolsVersion = 6.1;
@@ -983,7 +983,7 @@
 				INSTALL_OWNER = "";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -998,7 +998,7 @@
 				INSTALL_OWNER = "";
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};
@@ -1027,7 +1027,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "org.libgit2.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = SwiftGit2;
 				SWIFT_INCLUDE_PATHS = "$(SRCROOT)/libgit2";
-				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -1056,7 +1055,6 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "org.libgit2.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = SwiftGit2;
 				SWIFT_INCLUDE_PATHS = "$(SRCROOT)/libgit2";
-				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -1065,6 +1063,7 @@
 			baseConfigurationReference = BEB31F531A0D75EE00F525B9 /* Mac-Application.xcconfig */;
 			buildSettings = {
 				INFOPLIST_FILE = SwiftGit2Tests/Info.plist;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.libgit2.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
@@ -1075,6 +1074,7 @@
 			baseConfigurationReference = BEB31F531A0D75EE00F525B9 /* Mac-Application.xcconfig */;
 			buildSettings = {
 				INFOPLIST_FILE = SwiftGit2Tests/Info.plist;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.libgit2.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
diff --git a/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-OSX.xcscheme b/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-OSX.xcscheme
index ff804bf..0d9a6bf 100644
--- a/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-OSX.xcscheme
+++ b/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-OSX.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0810"
+   LastUpgradeVersion = "1010"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-iOS.xcscheme b/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-iOS.xcscheme
index afb97ef..6b12f5a 100644
--- a/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-iOS.xcscheme
+++ b/SwiftGit2.xcodeproj/xcshareddata/xcschemes/SwiftGit2-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0810"
+   LastUpgradeVersion = "1010"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/SwiftGit2Tests/RepositorySpec.swift b/SwiftGit2Tests/RepositorySpec.swift
index 081ed64..d021f45 100644
--- a/SwiftGit2Tests/RepositorySpec.swift
+++ b/SwiftGit2Tests/RepositorySpec.swift
@@ -55,7 +55,7 @@ class RepositorySpec: QuickSpec {
 
 			it("should return error if .git is not readable") {
 				let localURL = self.temporaryURL(forPurpose: "git-isValid-unreadable").appendingPathComponent(".git")
-				let nonReadablePermissions: [String: Any] = [FileAttributeKey.posixPermissions.rawValue: 0o077]
+				let nonReadablePermissions: [FileAttributeKey: Any] = [.posixPermissions: 0o077]
 				try! FileManager.default.createDirectory(
 					at: localURL,
 					withIntermediateDirectories: true,