diff --git a/.travis.yml b/.travis.yml
index 48d3626..ebabb75 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode10.2
+osx_image: xcode11
 sudo: false
 git:
   submodules: false
@@ -11,16 +11,16 @@ env:
   - LANG=en_US.UTF-8
   matrix:
     - DESTINATION="arch=x86_64"                         SCHEME="CoreStore OSX"     SDK=macosx10.14          RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=12.0,name=iPhone XS"              SCHEME="CoreStore iOS"     SDK=iphonesimulator12.0  RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=11.0.1,name=iPhone 8"             SCHEME="CoreStore iOS"     SDK=iphonesimulator12.0  RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=10.3.1,name=iPhone 7"             SCHEME="CoreStore iOS"     SDK=iphonesimulator12.0  RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=10.1,name=iPhone 7"               SCHEME="CoreStore iOS"     SDK=iphonesimulator12.0  RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=4.0,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator5.0    RUN_TESTS="NO"  POD_LINT="NO"
-    - DESTINATION="OS=3.2,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator5.0    RUN_TESTS="NO"  POD_LINT="NO"
-    - DESTINATION="OS=2.2,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator5.0    RUN_TESTS="NO"  POD_LINT="NO"
-    - DESTINATION="OS=12.0,name=Apple TV 4K"            SCHEME="CoreStore tvOS"    SDK=appletvsimulator12.0 RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=11.0,name=Apple TV 4K (at 1080p)" SCHEME="CoreStore tvOS"    SDK=appletvsimulator12.0 RUN_TESTS="YES" POD_LINT="NO"
-    - DESTINATION="OS=10.2,name=Apple TV 1080p"         SCHEME="CoreStore tvOS"    SDK=appletvsimulator12.0 RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=12.0,name=iPhone XS"              SCHEME="CoreStore iOS"     SDK=iphonesimulator13.0  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=11.0.1,name=iPhone 8"             SCHEME="CoreStore iOS"     SDK=iphonesimulator13.0  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=10.3.1,name=iPhone 7"             SCHEME="CoreStore iOS"     SDK=iphonesimulator13.0  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=10.1,name=iPhone 7"               SCHEME="CoreStore iOS"     SDK=iphonesimulator13.0  RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=4.0,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator6.0    RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=3.2,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator6.0    RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=2.2,name=Apple Watch - 42mm"      SCHEME="CoreStore watchOS" SDK=watchsimulator6.0    RUN_TESTS="NO"  POD_LINT="NO"
+    - DESTINATION="OS=12.0,name=Apple TV 4K"            SCHEME="CoreStore tvOS"    SDK=appletvsimulator13.0 RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=11.0,name=Apple TV 4K (at 1080p)" SCHEME="CoreStore tvOS"    SDK=appletvsimulator13.0 RUN_TESTS="YES" POD_LINT="NO"
+    - DESTINATION="OS=10.2,name=Apple TV 1080p"         SCHEME="CoreStore tvOS"    SDK=appletvsimulator13.0 RUN_TESTS="YES" POD_LINT="NO"
 before_install:
   - gem install cocoapods --no-rdoc --no-ri --no-document
   - gem install xcpretty --no-rdoc --no-ri --no-document
@@ -34,8 +34,8 @@ script:
       xcodebuild -workspace CoreStore.xcworkspace -scheme "$SCHEME" -sdk "$SDK" -destination "$DESTINATION" -configuration Debug ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
       xcodebuild -workspace CoreStore.xcworkspace -scheme "$SCHEME" -sdk "$SDK" -destination "$DESTINATION" -configuration Release ONLY_ACTIVE_ARCH=NO clean test | xcpretty -c;
     fi
-  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStoreDemo" -sdk "iphonesimulator12.0" -destination "OS=11.0.1,name=iPhone 8" -configuration Debug ONLY_ACTIVE_ARCH=NO build | xcpretty -c;
-  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStoreDemo" -sdk "iphonesimulator12.0" -destination "OS=11.0.1,name=iPhone 8" -configuration Release ONLY_ACTIVE_ARCH=NO build | xcpretty -c;
+  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStoreDemo" -sdk "iphonesimulator13.0" -destination "OS=13.0,name=iPhone 8" -configuration Debug ONLY_ACTIVE_ARCH=NO build | xcpretty -c;
+  - xcodebuild -workspace "CoreStore.xcworkspace" -scheme "CoreStoreDemo" -sdk "iphonesimulator13.0" -destination "OS=13.0,name=iPhone 8" -configuration Release ONLY_ACTIVE_ARCH=NO build | xcpretty -c;
   - if [ $POD_LINT == "YES" ]; then
       pod lib lint --quick;
     fi
diff --git a/CoreStore.xcodeproj/project.pbxproj b/CoreStore.xcodeproj/project.pbxproj
index ba01750..e3c36ae 100644
--- a/CoreStore.xcodeproj/project.pbxproj
+++ b/CoreStore.xcodeproj/project.pbxproj
@@ -7,6 +7,12 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		18166884232B9ED00097C275 /* KeyPath+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2C22D43E38009FA3BA /* KeyPath+KeyPaths.swift */; };
+		18166885232B9ED10097C275 /* KeyPath+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2C22D43E38009FA3BA /* KeyPath+KeyPaths.swift */; };
+		18166886232B9ED20097C275 /* KeyPath+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2C22D43E38009FA3BA /* KeyPath+KeyPaths.swift */; };
+		18166887232B9ED60097C275 /* String+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2A22D43931009FA3BA /* String+KeyPaths.swift */; };
+		18166888232B9ED70097C275 /* String+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2A22D43931009FA3BA /* String+KeyPaths.swift */; };
+		18166889232B9ED80097C275 /* String+KeyPaths.swift in Sources */ = {isa = PBXBuildFile; fileRef = B51B5C2A22D43931009FA3BA /* String+KeyPaths.swift */; };
 		2F03A53619C5C6DA005002A5 /* CoreStore.h in Headers */ = {isa = PBXBuildFile; fileRef = 2F03A53519C5C6DA005002A5 /* CoreStore.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		2F03A54D19C5C872005002A5 /* CoreData.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2F03A54C19C5C872005002A5 /* CoreData.framework */; };
 		2F291E2719C6D3CF007AF63F /* CoreStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2F291E2619C6D3CF007AF63F /* CoreStore.swift */; };
@@ -2125,6 +2131,7 @@
 				B509C7F51E54511B0061C547 /* ImportableAttributeType.swift in Sources */,
 				82BA18B31C4BBD3900A0916E /* ImportableUniqueObject.swift in Sources */,
 				B5E1B5951CAA0C15007FD580 /* CSObjectMonitor.swift in Sources */,
+				18166887232B9ED60097C275 /* String+KeyPaths.swift in Sources */,
 				B5ECDC2B1CA81CC700C7F112 /* CSDataStack+Transaction.swift in Sources */,
 				B56923F11EB827F6007C4DC9 /* XcodeSchemaMappingProvider.swift in Sources */,
 				82BA18A11C4BBD1D00A0916E /* CoreStore.swift in Sources */,
@@ -2219,6 +2226,7 @@
 				B5A991ED1E9DC2CE0091A2E3 /* VersionLock.swift in Sources */,
 				B5ECDBEE1CA6BF2000C7F112 /* CSFrom.swift in Sources */,
 				B52F743E1E9B8724005F3DAC /* DynamicSchema.swift in Sources */,
+				18166884232B9ED00097C275 /* KeyPath+KeyPaths.swift in Sources */,
 				B5E8A72121C1015300EF006A /* CoreStoreObject+Observing.swift in Sources */,
 				B5474D162227C08700B21FEC /* Internals.CoreStoreFetchRequest.swift in Sources */,
 				B56924001EB82976007C4DC9 /* CSUnsafeDataModelSchema.swift in Sources */,
@@ -2320,6 +2328,7 @@
 				B509C7F71E54511B0061C547 /* ImportableAttributeType.swift in Sources */,
 				B5220E1F1D130810009BC71E /* CSListObserver.swift in Sources */,
 				B52DD1941BE1F92500949AFE /* CoreStore.swift in Sources */,
+				18166889232B9ED80097C275 /* String+KeyPaths.swift in Sources */,
 				B52DD1A61BE1F92F00949AFE /* BaseDataTransaction+Importing.swift in Sources */,
 				B56923F31EB827F6007C4DC9 /* XcodeSchemaMappingProvider.swift in Sources */,
 				B5220E1D1D13080A009BC71E /* CSDataStack+Observing.swift in Sources */,
@@ -2414,6 +2423,7 @@
 				B5A991EF1E9DC2CE0091A2E3 /* VersionLock.swift in Sources */,
 				B5220E201D130813009BC71E /* CSObjectMonitor.swift in Sources */,
 				B52F74401E9B8724005F3DAC /* DynamicSchema.swift in Sources */,
+				18166886232B9ED20097C275 /* KeyPath+KeyPaths.swift in Sources */,
 				B5E8A72321C1015300EF006A /* CoreStoreObject+Observing.swift in Sources */,
 				B5474D182227C08700B21FEC /* Internals.CoreStoreFetchRequest.swift in Sources */,
 				B56924021EB82976007C4DC9 /* CSUnsafeDataModelSchema.swift in Sources */,
@@ -2515,6 +2525,7 @@
 				B509C7F61E54511B0061C547 /* ImportableAttributeType.swift in Sources */,
 				B5E1B5961CAA0C15007FD580 /* CSObjectMonitor.swift in Sources */,
 				B5ECDC2C1CA81CC700C7F112 /* CSDataStack+Transaction.swift in Sources */,
+				18166888232B9ED70097C275 /* String+KeyPaths.swift in Sources */,
 				B56321911BD65216006C9394 /* BaseDataTransaction+Importing.swift in Sources */,
 				B56923F21EB827F6007C4DC9 /* XcodeSchemaMappingProvider.swift in Sources */,
 				B546F95A1C99B17400D5AC55 /* CSCoreStore+Setup.swift in Sources */,
@@ -2609,6 +2620,7 @@
 				B5A991EE1E9DC2CE0091A2E3 /* VersionLock.swift in Sources */,
 				B5ECDBEF1CA6BF2000C7F112 /* CSFrom.swift in Sources */,
 				B52F743F1E9B8724005F3DAC /* DynamicSchema.swift in Sources */,
+				18166885232B9ED10097C275 /* KeyPath+KeyPaths.swift in Sources */,
 				B5E8A72221C1015300EF006A /* CoreStoreObject+Observing.swift in Sources */,
 				B5474D172227C08700B21FEC /* Internals.CoreStoreFetchRequest.swift in Sources */,
 				B56924011EB82976007C4DC9 /* CSUnsafeDataModelSchema.swift in Sources */,
diff --git a/Package.swift b/Package.swift
index 271d129..f6ec31f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:4.2
+// swift-tools-version:5.0
 //
 //  Package.swift
 //  CoreStore
@@ -28,6 +28,9 @@ import PackageDescription
 
 let package = Package(
     name: "CoreStore",
+    platforms: [
+           .macOS(.v10_12), .iOS(.v10), .tvOS(.v10), .watchOS(.v3)
+    ],
     products: [
         .library(name: "CoreStore", type: .static, targets: ["CoreStore"])
     ],