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/Package.resolved b/Package.resolved
new file mode 100644
index 0000000..b33c728
--- /dev/null
+++ b/Package.resolved
@@ -0,0 +1,34 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "BrightFutures",
+        "repositoryURL": "https://github.com/Thomvis/BrightFutures.git",
+        "state": {
+          "branch": null,
+          "revision": "9279defa6bdc21501ce740266e5a14d0119ddc63",
+          "version": "8.0.1"
+        }
+      },
+      {
+        "package": "FileKit",
+        "repositoryURL": "https://github.com/nvzqz/FileKit.git",
+        "state": {
+          "branch": null,
+          "revision": "826d9161b184509f80d85c28cd612d630646de98",
+          "version": "6.0.0"
+        }
+      },
+      {
+        "package": "Kanna",
+        "repositoryURL": "https://github.com/tid-kijyun/Kanna.git",
+        "state": {
+          "branch": null,
+          "revision": "9b8f73f8c8e145dc496565bbf878a709793e7ba3",
+          "version": "5.0.0"
+        }
+      }
+    ]
+  },
+  "version": 1
+}
diff --git a/Package.swift b/Package.swift
index 6981c9d..00f2497 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,30 +1,19 @@
-// Package.swift
-/*
- The MIT License (MIT)
- Copyright (c) 2016 Eric Marchand (phimage)
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
- The above copyright notice and this permission notice shall be included in all
- copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- SOFTWARE.
- */
-
+// swift-tools-version:5.1
 import PackageDescription
 
 let package = Package(
     name: "Erik",
+    products: [
+        .library(name: "Erik", targets: ["Erik"]),
+    ],
     dependencies: [
-        .Package(url: "https://github.com/tid-kijyun/Kanna.git", majorVersion: 4),
-        .Package(url: "https://github.com/Thomvis/BrightFutures.git", majorVersion: 6)
+        .package(url: "https://github.com/tid-kijyun/Kanna.git", .upToNextMajor(from: "5.0.0")),
+        .package(url: "https://github.com/Thomvis/BrightFutures.git", .upToNextMajor(from: "8.0.0")),
+        .package(url: "https://github.com/nvzqz/FileKit.git", .upToNextMajor(from: "6.0.0"))
+    ],
+    targets: [
+        .target(name: "Erik", dependencies: ["Kanna", "BrightFutures"], path: "Sources"),
+        .testTarget(name: "ErikTests", dependencies: ["Erik", "Kanna", "BrightFutures", "FileKit"], path: "ErikTests")
     ]
 )
+