diff --git a/CHANGELOG.md b/CHANGELOG.md
index c3131f5..39e23a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,8 @@
 
 ##### Enhancements
 
-* None.
+* Update Xcode project from Swift 4.2 to 5.0.
+* Enable `CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER`
 
 ##### Bug Fixes
 
diff --git a/Yams.xcodeproj/project.pbxproj b/Yams.xcodeproj/project.pbxproj
index fe344ed..1f8c5fd 100644
--- a/Yams.xcodeproj/project.pbxproj
+++ b/Yams.xcodeproj/project.pbxproj
@@ -291,7 +291,7 @@
 		OBJ_1 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1100;
+				LastUpgradeCheck = 1220;
 				TargetAttributes = {
 					OBJ_45 = {
 						LastSwiftMigration = 1100;
@@ -414,6 +414,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -442,7 +443,7 @@
 				SUPPORTED_PLATFORMS = "macosx iphoneos iphonesimulator appletvos appletvsimulator watchos watchsimulator";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -465,6 +466,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -490,7 +492,7 @@
 				SUPPORTED_PLATFORMS = "macosx iphoneos iphonesimulator appletvos appletvsimulator watchos watchsimulator";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
diff --git a/Yams.xcodeproj/xcshareddata/xcschemes/Yams.xcscheme b/Yams.xcodeproj/xcshareddata/xcschemes/Yams.xcscheme
index 1ef952e..20152ef 100644
--- a/Yams.xcodeproj/xcshareddata/xcschemes/Yams.xcscheme
+++ b/Yams.xcodeproj/xcshareddata/xcschemes/Yams.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1100"
+   LastUpgradeVersion = "1220"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"