diff --git a/Example/.DS_Store b/Example/.DS_Store
new file mode 100644
index 0000000..b1fb97f
Binary files /dev/null and b/Example/.DS_Store differ
diff --git a/Example/Podfile.lock b/Example/Podfile.lock
index 79fe9c0..4310cac 100644
--- a/Example/Podfile.lock
+++ b/Example/Podfile.lock
@@ -1,7 +1,7 @@
 PODS:
   - Instabug (5.2.4)
-  - Yoshi/Core (3.0.0)
-  - Yoshi/QAKit (3.0.0):
+  - Yoshi/Core (4.0.0)
+  - Yoshi/QAKit (4.0.0):
     - Yoshi/Core
 
 DEPENDENCIES:
@@ -18,8 +18,8 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   Instabug: 6fa40a5e2a4620f0589dfc8e4e01b1018c8c42b1
-  Yoshi: f681e9474a3d0aa8ec7ec935c579f52c2d00a360
+  Yoshi: efc151111ba019ff7dc82258c87a68376ec8b699
 
 PODFILE CHECKSUM: 6937f5f3704e17fb013434d20f6bd261b2e48f51
 
-COCOAPODS: 1.5.3
+COCOAPODS: 1.7.5
\ No newline at end of file
diff --git a/Example/YoshiExample.xcodeproj/project.pbxproj b/Example/YoshiExample.xcodeproj/project.pbxproj
index 6470c31..9dbd479 100644
--- a/Example/YoshiExample.xcodeproj/project.pbxproj
+++ b/Example/YoshiExample.xcodeproj/project.pbxproj
@@ -173,6 +173,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
@@ -207,7 +208,7 @@
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-resources.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-resources.sh",
 				"${PODS_ROOT}/Instabug/Instabug.bundle",
 			);
 			name = "[CP] Copy Pods Resources";
@@ -216,7 +217,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-resources.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-resources.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 		9807FA47239685B35BD1B1CC /* [CP] Embed Pods Frameworks */ = {
@@ -225,7 +226,7 @@
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-frameworks.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/Yoshi/Yoshi.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
@@ -234,7 +235,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-frameworks.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-YoshiExample/Pods-YoshiExample-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 		A406AEF3198A3BAC81FB073C /* [CP] Check Pods Manifest.lock */ = {
@@ -412,6 +413,7 @@
 				SWIFT_OBJC_BRIDGING_HEADER = "YoshiExample/YoshiExample-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -435,6 +437,7 @@
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "YoshiExample/YoshiExample-Bridging-Header.h";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
diff --git a/Yoshi.podspec b/Yoshi.podspec
index 41917e5..c1a9fdc 100644
--- a/Yoshi.podspec
+++ b/Yoshi.podspec
@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "Yoshi"
-  s.version          = "3.0.0"
+  s.version          = "4.0.0"
   s.summary          = "A helpful companion for your iOS app."
 
 # This description is used to generate tags and improve search results.
diff --git a/Yoshi/.DS_Store b/Yoshi/.DS_Store
new file mode 100644
index 0000000..2a7d9b3
Binary files /dev/null and b/Yoshi/.DS_Store differ
diff --git a/Yoshi/Yoshi.xcodeproj/project.pbxproj b/Yoshi/Yoshi.xcodeproj/project.pbxproj
index f42c373..08e94cd 100644
--- a/Yoshi/Yoshi.xcodeproj/project.pbxproj
+++ b/Yoshi/Yoshi.xcodeproj/project.pbxproj
@@ -348,7 +348,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0720;
-				LastUpgradeCheck = 0900;
+				LastUpgradeCheck = 1100;
 				ORGANIZATIONNAME = "Prolific Interactive";
 				TargetAttributes = {
 					276BCEA01C29A6EF002138C7 = {
@@ -357,7 +357,7 @@
 					};
 					276BCEAA1C29A6EF002138C7 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1100;
 					};
 				};
 			};
@@ -366,6 +366,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = 276BCE971C29A6EF002138C7;
@@ -455,6 +456,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -463,12 +465,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -511,6 +515,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -519,12 +524,14 @@
 				CLANG_WARN_BOOL_CONVERSION = YES;
 				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
@@ -574,7 +581,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -594,7 +601,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -606,7 +613,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.prolificinteractive.YoshiTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = On;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -618,7 +625,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.prolificinteractive.YoshiTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_SWIFT3_OBJC_INFERENCE = On;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
diff --git a/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/Yoshi.xcscheme b/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/Yoshi.xcscheme
index 92b844d..aac8985 100644
--- a/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/Yoshi.xcscheme
+++ b/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/Yoshi.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "1100"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,8 +26,16 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "276BCEA01C29A6EF002138C7"
+            BuildableName = "Yoshi.framework"
+            BlueprintName = "Yoshi"
+            ReferencedContainer = "container:Yoshi.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -40,23 +48,11 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "276BCEA01C29A6EF002138C7"
-            BuildableName = "Yoshi.framework"
-            BlueprintName = "Yoshi"
-            ReferencedContainer = "container:Yoshi.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
@@ -72,8 +68,6 @@
             ReferencedContainer = "container:Yoshi.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/YoshiTests.xcscheme b/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/YoshiTests.xcscheme
index 7a52cf1..94ba2e2 100644
--- a/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/YoshiTests.xcscheme
+++ b/Yoshi/Yoshi.xcodeproj/xcshareddata/xcschemes/YoshiTests.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0900"
+   LastUpgradeVersion = "1100"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -10,7 +10,6 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
@@ -24,22 +23,17 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
       allowLocationSimulation = "YES">
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/Yoshi/Yoshi/YoshiConfigurationManager.swift b/Yoshi/Yoshi/YoshiConfigurationManager.swift
index 70b8aa4..d0f6224 100644
--- a/Yoshi/Yoshi/YoshiConfigurationManager.swift
+++ b/Yoshi/Yoshi/YoshiConfigurationManager.swift
@@ -69,7 +69,7 @@ final class YoshiConfigurationManager {
         }
 
         let window = UIWindow(frame: UIScreen.main.bounds)
-        window.windowLevel = .normal
+        window.windowLevel = UIWindow.Level.normal
 
         // Use a dummy view controller with clear background.
         // This way, we can make the actual view controller we want to present a form sheet on the iPad.