diff --git a/Package.resolved b/Package.resolved
index 8447154..3513a6e 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -2,62 +2,53 @@
   "object": {
     "pins": [
       {
-        "package": "FileCheck",
-        "repositoryURL": "https://github.com/llvm-swift/FileCheck.git",
+        "package": "Chalk",
+        "repositoryURL": "https://github.com/mxcl/Chalk.git",
         "state": {
           "branch": null,
-          "revision": "0eb888b85ca08c7ce85c8a6a459c94d7f282c1bb",
-          "version": "0.2.1"
+          "revision": "9aa9f348b86db3cf6702a3e43c081ecec80cf3c7",
+          "version": "0.4.0"
         }
       },
       {
-        "package": "JSONAPI",
-        "repositoryURL": "https://github.com/mattpolzin/JSONAPI.git",
-        "state": {
-          "branch": null,
-          "revision": "6ab4237c97e27ab0b5e3e1fe34738fa031a8dab9",
-          "version": "3.0.0"
-        }
-      },
-      {
-        "package": "Poly",
-        "repositoryURL": "https://github.com/mattpolzin/Poly.git",
+        "package": "FileCheck",
+        "repositoryURL": "https://github.com/llvm-swift/FileCheck.git",
         "state": {
           "branch": null,
-          "revision": "0c9c08204142babc480938d704a23513d11420e5",
-          "version": "2.3.1"
+          "revision": "9ed91cc30a1a325d989fac117f3f3065a16b9f76",
+          "version": "0.2.3"
         }
       },
       {
-        "package": "Rainbow",
-        "repositoryURL": "https://github.com/onevcat/Rainbow.git",
+        "package": "JSONAPI",
+        "repositoryURL": "https://github.com/mattpolzin/JSONAPI",
         "state": {
           "branch": null,
-          "revision": "9c52c1952e9b2305d4507cf473392ac2d7c9b155",
-          "version": "3.1.5"
+          "revision": "bbd6db6d7a999c4109b4166a726a59157d16d875",
+          "version": "4.0.0-alpha.2"
         }
       },
       {
-        "package": "llbuild",
-        "repositoryURL": "https://github.com/apple/swift-llbuild.git",
+        "package": "Poly",
+        "repositoryURL": "https://github.com/mattpolzin/Poly",
         "state": {
           "branch": null,
-          "revision": "f73b84bc1525998e5e267f9d830c1411487ac65e",
-          "version": "0.2.0"
+          "revision": "9031b8497e025cbcfae196e59eecad5ba988e267",
+          "version": "2.4.0"
         }
       },
       {
-        "package": "SwiftPM",
-        "repositoryURL": "https://github.com/apple/swift-package-manager.git",
+        "package": "swift-tools-support-core",
+        "repositoryURL": "https://github.com/apple/swift-tools-support-core.git",
         "state": {
           "branch": null,
-          "revision": "9abcc2260438177cecd7cf5185b144d13e74122b",
-          "version": "0.5.0"
+          "revision": "693aba4c4c9dcc4767cc853a0dd38bf90ad8c258",
+          "version": "0.0.1"
         }
       },
       {
         "package": "SwiftCheck",
-        "repositoryURL": "https://github.com/typelift/SwiftCheck.git",
+        "repositoryURL": "https://github.com/typelift/SwiftCheck",
         "state": {
           "branch": null,
           "revision": "077c096c3ddfc38db223ac8e525ad16ffb987138",
diff --git a/Package.swift b/Package.swift
index 72be657..fbd8a16 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,5 +1,4 @@
-// swift-tools-version:5.1
-// The swift-tools-version declares the minimum version of Swift required to build this package.
+// swift-tools-version:5.2
 
 import PackageDescription
 
@@ -12,8 +11,8 @@ let package = Package(
             targets: ["JSONAPIArbitrary"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/typelift/SwiftCheck.git", .upToNextMinor(from: "0.12.0")),
-        .package(url: "https://github.com/mattpolzin/JSONAPI.git", .upToNextMajor(from: "3.0.0")),
+        .package(url: "https://github.com/typelift/SwiftCheck", .upToNextMinor(from: "0.12.0")),
+        .package(url: "https://github.com/mattpolzin/JSONAPI", from: "4.0.0-alpha.2"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.