diff --git a/Package.swift b/Package.swift
new file mode 100644
index 0000000..d530f01
--- /dev/null
+++ b/Package.swift
@@ -0,0 +1,20 @@
+// swift-tools-version: 5.5
+
+import PackageDescription
+
+let package = Package(
+    name: "SmoothRoundedRectangle",
+    platforms: [
+        .iOS(.v13),
+        .macOS(.v10_15),
+        .tvOS(.v13),
+        .watchOS(.v6),
+    ],
+    products: [
+        .library(name: "SmoothRoundedRectangle", targets: ["SmoothRoundedRectangle"]),
+    ],
+    dependencies: [],
+    targets: [
+        .target(name: "SmoothRoundedRectangle", path: "src"),
+    ]
+)
diff --git a/src/SmoothRoundedRectangle+Attributes.swift b/src/SmoothRoundedRectangle+Attributes.swift
index 5e94aff..ee587a6 100644
--- a/src/SmoothRoundedRectangle+Attributes.swift
+++ b/src/SmoothRoundedRectangle+Attributes.swift
@@ -23,15 +23,15 @@ public extension SmoothRoundedRectangle {
             self.rawValue = rawValue
         }
         
-        static let topLeft = Corners(rawValue: 1 << 0)
-        static let topRight = Corners(rawValue: 1 << 1)
-        static let bottomLeft = Corners(rawValue: 1 << 2)
-        static let bottomRight = Corners(rawValue: 1 << 3)
+        public static let topLeft = Corners(rawValue: 1 << 0)
+        public static let topRight = Corners(rawValue: 1 << 1)
+        public static let bottomLeft = Corners(rawValue: 1 << 2)
+        public static let bottomRight = Corners(rawValue: 1 << 3)
         
-        static let all: Corners = [.topLeft, .topRight, .bottomLeft, .bottomRight]
-        static let top: Corners = [.topLeft, .topRight]
-        static let bottom: Corners = [.bottomLeft, .bottomRight]
-        static let left: Corners = [.topLeft, .bottomLeft]
-        static let right: Corners = [.topRight, .bottomRight]
+        public static let all: Corners = [.topLeft, .topRight, .bottomLeft, .bottomRight]
+        public static let top: Corners = [.topLeft, .topRight]
+        public static let bottom: Corners = [.bottomLeft, .bottomRight]
+        public static let left: Corners = [.topLeft, .bottomLeft]
+        public static let right: Corners = [.topRight, .bottomRight]
     }
 }