diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index bc9706fe..84f76efc 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -7,21 +7,32 @@ on:
     branches: [main]
 
 jobs:
-  macos_build:
+  macos-swift5_2:
     runs-on: macos-10.15
 
     steps:
       - uses: actions/checkout@v2
       - name: Build on macOS 10.15 with Swift 5.2
         run: |
-          sudo xcode-select --switch /Applications/Xcode_11.6.app/Contents/Developer
+          sudo xcode-select --switch /Applications/Xcode_11.7.app/Contents/Developer
           swift build
 
-  linux_build:
+  macos-swift5_3:
+    runs-on: macos-10.15
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build on macOS 10.15 with Swift 5.3
+        run: |
+          sudo xcode-select --switch /Applications/Xcode_12.app/Contents/Developer
+          swift build
+
+  linux-swift5_3:
     runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2
+
       - name: Build on Ubuntu 20.04 with Swift 5.2
         run: |
           swift build
diff --git a/.swift-version b/.swift-version
deleted file mode 100644
index 73ce9502..00000000
--- a/.swift-version
+++ /dev/null
@@ -1 +0,0 @@
-5.2.4
diff --git a/Brewfile b/Brewfile
index 56a627c7..c4186786 100644
--- a/Brewfile
+++ b/Brewfile
@@ -1,3 +1,5 @@
 brew "pre-commit"
 brew "swiftformat"
 brew "swiftlint"
+brew "binaryen"
+brew "wabt"
diff --git a/Package.resolved b/Package.resolved
index 533086d7..62c20722 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -51,8 +51,8 @@
         "repositoryURL": "https://github.com/apple/swift-argument-parser",
         "state": {
           "branch": null,
-          "revision": "3e7d2fe99da091dcc1e4a7dd22fc3cfc2dca7937",
-          "version": "0.2.2"
+          "revision": "92646c0cdbaca076c8d3d0207891785b3379cbff",
+          "version": "0.3.1"
         }
       },
       {
@@ -150,8 +150,8 @@
         "repositoryURL": "https://github.com/vapor/vapor.git",
         "state": {
           "branch": null,
-          "revision": "66f412bcb276c09ad3a5df263f159cee9fecc310",
-          "version": "4.29.1"
+          "revision": "236c616ca1d781e9dc9b6a8f3f1e1427a326c161",
+          "version": "4.29.3"
         }
       },
       {
diff --git a/Package.swift b/Package.swift
index b0e401a3..9fb96cc0 100644
--- a/Package.swift
+++ b/Package.swift
@@ -20,11 +20,11 @@ let package = Package(
     ),
     .package(
       url: "https://github.com/apple/swift-tools-support-core.git",
-      .upToNextMinor(from: "0.1.3")
+      .upToNextMinor(from: "0.1.10")
     ),
     .package(url: "https://github.com/OpenCombine/OpenCombine.git", from: "0.10.0"),
-    .package(url: "https://github.com/vapor/vapor.git", from: "4.15.2"),
-    .package(url: "https://github.com/apple/swift-crypto.git", from: "1.0.2"),
+    .package(url: "https://github.com/vapor/vapor.git", from: "4.29.3"),
+    .package(url: "https://github.com/apple/swift-crypto.git", from: "1.1.0"),
   ],
   targets: [
     // Targets are the basic building blocks of a package. A target can define a module
diff --git a/Package@swift-5.2.swift b/Package@swift-5.2.swift
index fdf43d84..2bc3c949 100644
--- a/Package@swift-5.2.swift
+++ b/Package@swift-5.2.swift
@@ -10,14 +10,15 @@ let package = Package(
     .package(url: "https://github.com/swift-server/async-http-client.git", from: "1.1.1"),
     .package(
       url: "https://github.com/apple/swift-argument-parser",
-      .upToNextMinor(from: "0.2.0")
+      .upToNextMinor(from: "0.3.0")
     ),
     .package(
       url: "https://github.com/apple/swift-tools-support-core.git",
-      .upToNextMinor(from: "0.1.3")
+      .upToNextMinor(from: "0.1.10")
     ),
     .package(url: "https://github.com/OpenCombine/OpenCombine.git", from: "0.10.0"),
-    .package(url: "https://github.com/vapor/vapor.git", from: "4.15.2"),
+    .package(url: "https://github.com/vapor/vapor.git", from: "4.29.3"),
+    .package(url: "https://github.com/apple/swift-crypto.git", from: "1.1.0"),
   ],
   targets: [
     // Targets are the basic building blocks of a package. A target can define a module
@@ -28,6 +29,7 @@ let package = Package(
       dependencies: [
         .product(name: "ArgumentParser", package: "swift-argument-parser"),
         .product(name: "AsyncHTTPClient", package: "async-http-client"),
+        .product(name: "Crypto", package: "swift-crypto"),
         .product(name: "SwiftToolsSupport-auto", package: "swift-tools-support-core"),
         .product(name: "Vapor", package: "vapor"),
         "CartonHelpers",
diff --git a/Sources/CartonHelpers/DefaultToolchain.swift b/Sources/CartonHelpers/DefaultToolchain.swift
index 3492eb22..d05bd7be 100644
--- a/Sources/CartonHelpers/DefaultToolchain.swift
+++ b/Sources/CartonHelpers/DefaultToolchain.swift
@@ -12,4 +12,4 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-public let defaultToolchainVersion = "wasm-5.3-SNAPSHOT-2020-09-08-a"
+public let defaultToolchainVersion = "wasm-5.3-SNAPSHOT-2020-09-25-a"
diff --git a/TestApp/.swift-version b/TestApp/.swift-version
index e35121c6..253d11f4 100644
--- a/TestApp/.swift-version
+++ b/TestApp/.swift-version
@@ -1 +1 @@
-wasm-5.3-SNAPSHOT-2020-09-08-a
+wasm-5.3-SNAPSHOT-2020-09-25-a
diff --git a/TestApp/Sources/TestApp/main.swift b/TestApp/Sources/TestApp/main.swift
index 77739e18..90523a27 100644
--- a/TestApp/Sources/TestApp/main.swift
+++ b/TestApp/Sources/TestApp/main.swift
@@ -16,6 +16,7 @@ import CustomPathTarget
 import Foundation
 import JavaScriptKit
 import TestLibrary
+import WASILibc
 
 let document = JSObject.global.document.object!
 
@@ -25,6 +26,7 @@ let body = document.body.object!
 _ = body.appendChild!(button)
 
 print("Number of seconds since epoch: \(Date().timeIntervalSince1970)")
+print("cos(M_PI) is \(cos(M_PI))")
 print(customTargetText)
 
 func crash() {