diff --git a/.github/actions/install-swift/action.yml b/.github/actions/install-swift/action.yml
index bdc4c9345..d6fbcc969 100644
--- a/.github/actions/install-swift/action.yml
+++ b/.github/actions/install-swift/action.yml
@@ -1,9 +1,8 @@
+name: 'Install Swift toolchain'
+description: 'Install Swift toolchain tarball from URL'
 inputs:
-  swift-dir:
-    description: The directory name part of the distribution URL
-    required: true
-  swift-version:
-    description: Git tag indicating the Swift version
+  download-url:
+    description: 'URL to download Swift toolchain tarball'
     required: true
 
 runs:
@@ -33,12 +32,6 @@ runs:
         zlib1g-dev
         curl
 
-    - name: Download Swift
-      shell: bash
-      run: curl -fLO https://download.swift.org/${{ inputs.swift-dir }}/${{ inputs.swift-version }}/${{ inputs.swift-version }}-ubuntu22.04.tar.gz
-      working-directory: ${{ env.RUNNER_TEMP }}
-
-    - name: Unarchive and Install Swift
+    - name: Install Swift
       shell: bash
-      run: sudo tar -xf ${{ inputs.swift-version }}-ubuntu22.04.tar.gz --strip-components=2 -C /usr/local
-      working-directory: ${{ env.RUNNER_TEMP }}
+      run: curl -fL ${{ inputs.download-url }} | sudo tar xfz - --strip-components=2 -C /usr/local
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8ba892e06..8ed33aa5d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,22 +23,33 @@ jobs:
           - { os: ubuntu-20.04, toolchain: wasm-5.9.1-RELEASE, wasi-backend: MicroWASI }
           - { os: ubuntu-20.04, toolchain: wasm-5.10.0-RELEASE, wasi-backend: MicroWASI }
           - os: ubuntu-22.04
-            toolchain: DEVELOPMENT-SNAPSHOT-2024-06-13-a
+            toolchain:
+              download-url: https://download.swift.org/swift-6.0.2-release/ubuntu2204/swift-6.0.2-RELEASE/swift-6.0.2-RELEASE-ubuntu22.04.tar.gz
             swift-sdk:
-              id: DEVELOPMENT-SNAPSHOT-2024-06-14-a-wasm32-unknown-wasi
-              download-url: "https://github.com/swiftwasm/swift/releases/download/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-06-14-a/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-06-14-a-wasm32-unknown-wasi.artifactbundle.zip"
+              id: 6.0.2-RELEASE-wasm32-unknown-wasi
+              download-url: "https://github.com/swiftwasm/swift/releases/download/swift-wasm-6.0.2-RELEASE/swift-wasm-6.0.2-RELEASE-wasm32-unknown-wasi.artifactbundle.zip"
+              checksum: "6ffedb055cb9956395d9f435d03d53ebe9f6a8d45106b979d1b7f53358e1dcb4"
             wasi-backend: Node
           - os: ubuntu-22.04
-            toolchain: DEVELOPMENT-SNAPSHOT-2024-06-13-a
+            toolchain:
+              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a-ubuntu22.04.tar.gz
             swift-sdk:
-              id: DEVELOPMENT-SNAPSHOT-2024-06-14-a-wasm32-unknown-wasip1-threads
-              download-url: "https://github.com/swiftwasm/swift/releases/download/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-06-14-a/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-06-14-a-wasm32-unknown-wasip1-threads.artifactbundle.zip"
+              id: DEVELOPMENT-SNAPSHOT-2024-10-31-a-wasm32-unknown-wasi
+              download-url: "https://github.com/swiftwasm/swift/releases/download/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-10-31-a/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-10-31-a-wasm32-unknown-wasi.artifactbundle.zip"
+              checksum: "e42546397786ea6eaec2d9c07f9118a6f3428784cf3df3840a369f19700c1a69"
+            wasi-backend: Node
+          - os: ubuntu-22.04
+            toolchain:
+              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a-ubuntu22.04.tar.gz
+            swift-sdk:
+              id: DEVELOPMENT-SNAPSHOT-2024-10-31-a-wasm32-unknown-wasip1-threads
+              download-url: "https://github.com/swiftwasm/swift/releases/download/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-10-31-a/swift-wasm-DEVELOPMENT-SNAPSHOT-2024-10-31-a-wasm32-unknown-wasip1-threads.artifactbundle.zip"
+              checksum: "17dbbe61af6ca09c92ee2d68a56d5716530428e28c4c8358aa860cc4fcdc91ae"
             wasi-backend: Node
 
     runs-on: ${{ matrix.entry.os }}
     env:
       JAVASCRIPTKIT_WASI_BACKEND: ${{ matrix.entry.wasi-backend }}
-      SWIFT_VERSION: ${{ matrix.entry.toolchain }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -52,12 +63,11 @@ jobs:
       - uses: ./.github/actions/install-swift
         if: ${{ matrix.entry.swift-sdk }}
         with:
-          swift-dir: development/ubuntu2204
-          swift-version: swift-${{ matrix.entry.toolchain }}
+          download-url: ${{ matrix.entry.toolchain.download-url }}
       - name: Install Swift SDK
         if: ${{ matrix.entry.swift-sdk }}
         run: |
-          swift sdk install "${{ matrix.entry.swift-sdk.download-url }}"
+          swift sdk install "${{ matrix.entry.swift-sdk.download-url }}" --checksum "${{ matrix.entry.swift-sdk.checksum }}"
           echo "SWIFT_SDK_ID=${{ matrix.entry.swift-sdk.id }}" >> $GITHUB_ENV
       - run: make bootstrap
       - run: make test
@@ -94,11 +104,11 @@ jobs:
       matrix:
         entry:
           - os: ubuntu-22.04
-            toolchain: DEVELOPMENT-SNAPSHOT-2024-09-25-a
+            toolchain:
+              download-url: https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a-ubuntu22.04.tar.gz
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/install-swift
         with:
-          swift-dir: development/ubuntu2204
-          swift-version: swift-${{ matrix.entry.toolchain }}
+          download-url: ${{ matrix.entry.toolchain.download-url }}
       - run: ./Examples/Embedded/build.sh
diff --git a/IntegrationTests/lib.js b/IntegrationTests/lib.js
index ed66c7e86..6c08cddde 100644
--- a/IntegrationTests/lib.js
+++ b/IntegrationTests/lib.js
@@ -177,7 +177,7 @@ export const startWasiTask = async (wasmPath, wasiConstructorKey = selectWASIBac
         // We don't have JS API to get memory descriptor of imported memory
         // at this moment, so we assume 256 pages (16MB) memory is enough
         // large for initial memory size.
-        const memory = new WebAssembly.Memory({ initial: 256, maximum: 16384, shared: true })
+        const memory = new WebAssembly.Memory({ initial: 1024, maximum: 16384, shared: true })
         importObject["env"] = { memory };
         importObject["wasi"] = {
           "thread-spawn": (startArg) => {
diff --git a/Package.swift b/Package.swift
index 1f35305a1..c33d7e71b 100644
--- a/Package.swift
+++ b/Package.swift
@@ -44,6 +44,9 @@ let package = Package(
                 "JavaScriptEventLoop",
                 "JavaScriptKit",
                 "JavaScriptEventLoopTestSupport",
+            ],
+            swiftSettings: [
+                .enableExperimentalFeature("Extern")
             ]
         ),
         .target(name: "_CJavaScriptEventLoop"),
diff --git a/scripts/install-toolchain.sh b/scripts/install-toolchain.sh
deleted file mode 100755
index ef085aaaf..000000000
--- a/scripts/install-toolchain.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/bash
-set -eu
-
-scripts_dir="$(cd "$(dirname $0)" && pwd)"
-
-default_swift_version="$(cat $scripts_dir/../.swift-version)"
-SWIFT_VERSION="${SWIFT_VERSION:-$default_swift_version}"
-swift_tag="swift-$SWIFT_VERSION"
-
-if [ -z "$(which swiftenv)" ]; then
-  echo "swiftenv not installed, please install it before this script."
-  exit 1
-fi
-
-if [ ! -z "$(swiftenv versions | grep $SWIFT_VERSION)" ]; then
-  echo "$SWIFT_VERSION is already installed."
-  exit 0
-fi
-
-case $(uname -s) in
-  Darwin)
-    toolchain_download="$swift_tag-macos_x86_64.pkg"
-  ;;
-  Linux)
-    if [ $(grep RELEASE /etc/lsb-release) == "DISTRIB_RELEASE=18.04" ]; then
-      toolchain_download="$swift_tag-ubuntu18.04_x86_64.tar.gz"
-    elif [ $(grep RELEASE /etc/lsb-release) == "DISTRIB_RELEASE=20.04" ]; then
-      toolchain_download="$swift_tag-ubuntu20.04_x86_64.tar.gz"
-    else
-      echo "Unknown Ubuntu version"
-      exit 1
-    fi
-  ;;
-  *)
-    echo "Unrecognised platform $(uname -s)"
-    exit 1
-  ;;
-esac
-
-toolchain_download_url="https://github.com/swiftwasm/swift/releases/download/$swift_tag/$toolchain_download"
-
-swiftenv install "$toolchain_download_url"