diff --git a/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.pbxproj b/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.pbxproj
index a40a882..124de9c 100644
--- a/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.pbxproj
+++ b/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.pbxproj
@@ -325,6 +325,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = A3169DA61DE05E8300BABAFD;
@@ -652,7 +653,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -703,7 +704,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -724,11 +725,13 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Sources/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.collectionviewleftalignflowlayout;
 				PRODUCT_NAME = DGCollectionViewLeftAlignFlowLayout;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -745,10 +748,12 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = Sources/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.collectionviewleftalignflowlayout;
 				PRODUCT_NAME = DGCollectionViewLeftAlignFlowLayout;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -760,9 +765,11 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = 582762VK3P;
 				INFOPLIST_FILE = Tests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.DGCollectionViewLeftAlignFlowLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -774,9 +781,11 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = 582762VK3P;
 				INFOPLIST_FILE = Tests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.DGCollectionViewLeftAlignFlowLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -798,8 +807,9 @@
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Debug;
 		};
@@ -820,8 +830,9 @@
 				PRODUCT_NAME = DGCollectionViewLeftAlignFlowLayout;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Release;
 		};
@@ -836,7 +847,8 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.DGCollectionViewLeftAlignFlowLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
-				TVOS_DEPLOYMENT_TARGET = 10.0;
+				SWIFT_VERSION = 5.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Debug;
 		};
@@ -851,7 +863,8 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.digipolitan.DGCollectionViewLeftAlignFlowLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = appletvos;
-				TVOS_DEPLOYMENT_TARGET = 10.0;
+				SWIFT_VERSION = 5.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Release;
 		};
diff --git a/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/DGCollectionViewLeftAlignFlowLayout.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/Package.swift b/Package.swift
index 867b0d1..a19039f 100755
--- a/Package.swift
+++ b/Package.swift
@@ -1,7 +1,24 @@
+// swift-tools-version:5.1
 import PackageDescription
 
 let package = Package(
     name: "DGCollectionViewLeftAlignFlowLayout",
+    platforms: [
+        .iOS(.v12)
+    ],
+    products: [
+        .library(
+            name: "DGCollectionViewLeftAlignFlowLayout",
+            targets: ["DGCollectionViewLeftAlignFlowLayout"]
+        )
+    ],
     dependencies: [
+        
+    ],
+    targets: [
+        .target(
+            name: "DGCollectionViewLeftAlignFlowLayout",
+            path: "Sources"
+        )
     ]
 )