diff --git a/SwiftFilePath.xcodeproj/project.pbxproj b/SwiftFilePath.xcodeproj/project.pbxproj
index fa1a1a8..b34e595 100644
--- a/SwiftFilePath.xcodeproj/project.pbxproj
+++ b/SwiftFilePath.xcodeproj/project.pbxproj
@@ -371,24 +371,31 @@
 				TargetAttributes = {
 					CC7832EB1A610124005E77C3 = {
 						CreatedOnToolsVersion = 6.1;
+						LastSwiftMigration = 0800;
 					};
 					CC7832F61A610125005E77C3 = {
 						CreatedOnToolsVersion = 6.1;
+						LastSwiftMigration = 0800;
 					};
 					D63BC3981C172BCD0071D0E2 = {
 						CreatedOnToolsVersion = 7.1.1;
+						LastSwiftMigration = 0800;
 					};
 					D63BC3A11C172BCD0071D0E2 = {
 						CreatedOnToolsVersion = 7.1.1;
+						LastSwiftMigration = 0800;
 					};
 					D63BC3B41C172C540071D0E2 = {
 						CreatedOnToolsVersion = 7.1.1;
+						LastSwiftMigration = 0800;
 					};
 					D63BC3C11C172C740071D0E2 = {
 						CreatedOnToolsVersion = 7.1.1;
+						LastSwiftMigration = 0800;
 					};
 					D63BC3CA1C172C740071D0E2 = {
 						CreatedOnToolsVersion = 7.1.1;
+						LastSwiftMigration = 0800;
 					};
 				};
 			};
@@ -657,6 +664,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = SwiftFilePath;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -674,6 +682,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = SwiftFilePath;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -692,6 +701,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -706,6 +716,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -725,6 +736,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
@@ -747,6 +759,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
@@ -762,6 +775,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.SwiftFilePath-tvOSTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
+				SWIFT_VERSION = 2.3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Debug;
@@ -777,6 +791,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.SwiftFilePath-tvOSTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
+				SWIFT_VERSION = 2.3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Release;
@@ -798,6 +813,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -821,6 +837,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = watchos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = 4;
 				WATCHOS_DEPLOYMENT_TARGET = 2.0;
 			};
@@ -845,6 +862,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -868,6 +886,7 @@
 				PRODUCT_NAME = SwiftFilePath;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -884,6 +903,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.SwiftFilePath-MacTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -901,6 +921,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "me.nori0620.SwiftFilePath-MacTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -941,6 +962,7 @@
 				D63BC3AC1C172BCD0071D0E2 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		D63BC3AD1C172BCD0071D0E2 /* Build configuration list for PBXNativeTarget "SwiftFilePath-tvOS Tests" */ = {
 			isa = XCConfigurationList;
@@ -949,6 +971,7 @@
 				D63BC3AF1C172BCD0071D0E2 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		D63BC3BA1C172C540071D0E2 /* Build configuration list for PBXNativeTarget "SwiftFilePath-watchOS" */ = {
 			isa = XCConfigurationList;
@@ -957,6 +980,7 @@
 				D63BC3BC1C172C540071D0E2 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		D63BC3D31C172C740071D0E2 /* Build configuration list for PBXNativeTarget "SwiftFilePath-Mac" */ = {
 			isa = XCConfigurationList;
@@ -965,6 +989,7 @@
 				D63BC3D51C172C740071D0E2 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		D63BC3D61C172C740071D0E2 /* Build configuration list for PBXNativeTarget "SwiftFilePath-Mac Tests" */ = {
 			isa = XCConfigurationList;
@@ -973,6 +998,7 @@
 				D63BC3D81C172C740071D0E2 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/SwiftFilePath/PathExtensionDir.swift b/SwiftFilePath/PathExtensionDir.swift
index 52dfb2e..ec05adc 100644
--- a/SwiftFilePath/PathExtensionDir.swift
+++ b/SwiftFilePath/PathExtensionDir.swift
@@ -72,7 +72,7 @@ extension Path: SequenceType {
     public func content(path_string:NSString) -> Path {
         return Path(
             NSURL(fileURLWithPath: self.path_string)
-                .URLByAppendingPathComponent( path_string as String )
+                .URLByAppendingPathComponent( path_string as String )!
                 .path!
         )
     }
@@ -102,7 +102,7 @@ extension Path: SequenceType {
     public func generate() -> AnyGenerator<Path> {
         assert(self.isDir,"To get iterator, path must be dir< \(path_string) >")
         let iterator = fileManager.enumeratorAtPath(path_string)
-        return anyGenerator() {
+        return AnyGenerator() {
             let optionalContent = iterator?.nextObject() as! String?
             if let content = optionalContent {
                 return self.content(content)
diff --git a/SwiftFilePathTests/SwiftFilePathTests.swift b/SwiftFilePathTests/SwiftFilePathTests.swift
index d2bdfbf..aa01b19 100644
--- a/SwiftFilePathTests/SwiftFilePathTests.swift
+++ b/SwiftFilePathTests/SwiftFilePathTests.swift
@@ -257,8 +257,8 @@ class SwiftFilePathTests: XCTestCase {
         
         for content in sandboxDir {
             XCTAssertTrue(content.exists)
-            contentCount++
-            if( content.isDir ){ dirCount++ }
+            contentCount += 1
+            if( content.isDir ){ dirCount += 1 }
         }
         XCTAssertEqual( contentCount, 3)
         XCTAssertEqual( dirCount, 1)
@@ -460,4 +460,4 @@ class SwiftFilePathTests: XCTestCase {
         }
     }
     
-}
\ No newline at end of file
+}