diff --git a/.DS_Store b/.DS_Store
index 9440645..8545bbf 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/Example/.DS_Store b/Example/.DS_Store
index bbb0bda..620d4db 100644
Binary files a/Example/.DS_Store and b/Example/.DS_Store differ
diff --git a/Example/Athlee-Onboarding/OnboardingKit Swift3.xcodeproj/project.pbxproj b/Example/Athlee-Onboarding/OnboardingKit Swift3.xcodeproj/project.pbxproj
index 0d7ed1e..6f92f14 100644
--- a/Example/Athlee-Onboarding/OnboardingKit Swift3.xcodeproj/project.pbxproj	
+++ b/Example/Athlee-Onboarding/OnboardingKit Swift3.xcodeproj/project.pbxproj	
@@ -251,6 +251,7 @@
 				TargetAttributes = {
 					048680621D8E204C004B011E = {
 						CreatedOnToolsVersion = 8.0;
+						DevelopmentTeam = RG4N372RZE;
 						LastSwiftMigration = 0800;
 						ProvisioningStyle = Automatic;
 					};
@@ -455,7 +456,8 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = "";
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				DEVELOPMENT_TEAM = RG4N372RZE;
 				INFOPLIST_FILE = "OnboardingKit Swift3/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.athlee.OnboardingKit-Swift3";
@@ -468,7 +470,8 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
-				DEVELOPMENT_TEAM = "";
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				DEVELOPMENT_TEAM = RG4N372RZE;
 				INFOPLIST_FILE = "OnboardingKit Swift3/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.athlee.OnboardingKit-Swift3";
diff --git a/OnboardingKit.podspec b/OnboardingKit.podspec
index 320f7b8..99d933a 100644
--- a/OnboardingKit.podspec
+++ b/OnboardingKit.podspec
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   s.license      = { :type => "MIT", :file => "LICENSE" }
   s.author             = { "Eugene Mozharovsky" => "mozharovsky@live.com" }
   s.social_media_url   = "http://twitter.com/dottieyottie"
-  s.platform     = :ios, "9.0"
+  s.platform     = :ios, "10.0"
   s.ios.deployment_target = "8.0"
   s.source       = { :git => "https://github.com/Athlee/OnboardingKit.git", :tag => s.version }
   s.source_files  = "Source/**/*.swift"
diff --git a/Source/TZStackView/TZStackView.swift b/Source/TZStackView/TZStackView.swift
index dfeee6b..cca567c 100755
--- a/Source/TZStackView/TZStackView.swift
+++ b/Source/TZStackView/TZStackView.swift
@@ -216,7 +216,7 @@ open class TZStackView: UIView {
             switch distribution {
             case .fillEqually, .fill, .fillProportionally:
                 if alignment != .fill || layoutMarginsRelativeArrangement {
-                    addSpacerView()
+                    _ = addSpacerView()
                 }
 
                 stackViewConstraints += createMatchEdgesContraints(arrangedSubviews)
@@ -248,7 +248,7 @@ open class TZStackView: UIView {
                     index += 1
                 }
                 if spacerViews.count == 0 {
-                    addSpacerView()
+                    _ = addSpacerView()
                 }
                 
                 stackViewConstraints += createMatchEdgesContraints(arrangedSubviews)
@@ -270,11 +270,11 @@ open class TZStackView: UIView {
             case .equalCentering:
                 for (index, _) in visibleArrangedSubviews.enumerated() {
                     if index > 0 {
-                        addSpacerView()
+                        _ = addSpacerView()
                     }
                 }
                 if spacerViews.count == 0 {
-                    addSpacerView()
+                    _ = addSpacerView()
                 }
                 
                 stackViewConstraints += createMatchEdgesContraints(arrangedSubviews)