diff --git a/.github/autobuild/windows.ps1 b/.github/autobuild/windows.ps1
index 4af8c27026..74cc0485e5 100644
--- a/.github/autobuild/windows.ps1
+++ b/.github/autobuild/windows.ps1
@@ -16,22 +16,54 @@ $ErrorActionPreference = "Stop"
 
 $QtDir = 'C:\Qt'
 $ChocoCacheDir = 'C:\ChocoCache'
+$DownloadCacheDir = 'C:\AutobuildCache'
 # The following version pinnings are semi-automatically checked for
 # updates. Verify .github/workflows/bump-dependencies.yaml when changing those manually:
 $Qt32Version = "5.15.2"
 $Qt64Version = "5.15.2"
 $AqtinstallVersion = "3.1.0"
-$JackVersion = "1.9.21.20221111"
+$JackVersion = "1.9.21"
 $Msvc32Version = "win32_msvc2019"
 $Msvc64Version = "win64_msvc2019_64"
 $JomVersion = "1.1.2"
 
+# Compose JACK download urls
+$JackBaseUrl = "https://github.com/jackaudio/jack2-releases/releases/download/v${JackVersion}/jack2-win"
+$Jack64Url = $JackBaseUrl + "64-v${JackVersion}.exe"
+$Jack32Url = $JackBaseUrl + "32-v${JackVersion}.exe"
+
 $JamulusVersion = $Env:JAMULUS_BUILD_VERSION
 if ( $JamulusVersion -notmatch '^\d+\.\d+\.\d+.*' )
 {
     throw "Environment variable JAMULUS_BUILD_VERSION has to be set to a valid version string"
 }
 
+# Download dependency to cache directory
+Function Download-Dependency
+{
+    param(
+        [Parameter(Mandatory=$true)]
+        [string] $Uri,
+        [Parameter(Mandatory=$true)]
+        [string] $Name
+    )
+
+
+    # Restore dependency if cached copy already exists
+    if (Test-Path -Path "$DownloadCacheDir\$Name" -PathType Leaf)
+    {
+        echo "Using ${DownloadCacheDir}\${Name} from previous run (actions/cache)"
+        return
+    }
+
+    Invoke-WebRequest -Uri $Uri -OutFile "${DownloadCacheDir}\${Name}"
+
+    if ( !$? )
+    {
+        throw "Download of "+ $Name + " (" + $Uri + ") failed with exit code $LastExitCode"
+    }
+}
+
 Function Install-Qt
 {
     param(
@@ -100,21 +132,52 @@ Function Ensure-JACK
         return
     }
 
-    echo "Install JACK2 64-bit..."
-    # Install JACK2 64-bit
-    choco install --no-progress -y jack --version "${JackVersion}"
+    # Set installer parameters for silent install
+
+    $JACKInstallParms = "/VERYSILENT", "/SUPPRESSMSGBOXES", "/NORESTART"
+
+    # Create cache directory if it doesn't exist yet
+
+    if (-not(Test-Path -Path "$DownloadCacheDir"))
+    {
+        New-Item -Path $DownloadCacheDir -ItemType "directory"
+    }
+
+    echo "Downloading 64 Bit and 32 Bit JACK installer (if needed)..."
+
+    Download-Dependency -Uri $Jack64Url -Name "JACK64.exe"
+    Download-Dependency -Uri $Jack32Url -Name "JACK32.exe"
+
+    # Install JACK 64 Bit silently via installer
+
+    echo "Installing JACK2 64-bit..."
+
+    $JACKInstallPath = "${DownloadCacheDir}\JACK64.exe"
+
+    & $JACKInstallPath $JACKInstallParms
+
     if ( !$? )
     {
-        throw "64bit jack installation failed with exit code $LastExitCode"
+        throw "64bit JACK installer failed with exit code $LastExitCode"
+    } else {
+        echo "64bit JACK installation completed successfully"
     }
 
-    echo "Install JACK2 32-bit..."
-    # Install JACK2 32-bit (need to force choco install as it detects 64 bits as installed)
-    choco install --no-progress -y -f --forcex86 jack --version "${JackVersion}"
+    echo "Installing JACK2 32-bit..."
+
+    # Install JACK 32 Bit silently via installer
+
+    $JACKInstallPath = "${DownloadCacheDir}\JACK32.exe"
+
+    & $JACKInstallPath $JACKInstallParms
+
     if ( !$? )
     {
-        throw "32bit jack installation failed with exit code $LastExitCode"
+        throw "32bit JACK installer failed with exit code $LastExitCode"
+    } else {
+        echo "32bit JACK installation completed successfully"
     }
+
 }
 
 Function Build-App-With-Installer
diff --git a/.github/workflows/autobuild.yml b/.github/workflows/autobuild.yml
index 95332917f2..3640bcef1c 100644
--- a/.github/workflows/autobuild.yml
+++ b/.github/workflows/autobuild.yml
@@ -329,6 +329,7 @@ jobs:
           path: |
             C:\Qt
             C:\ChocoCache
+            C:\AutobuildCache
             ${{ github.workspace }}\libs\NSIS\NSIS-source
             ${{ github.workspace }}\libs\ASIOSDK2
           key:                      ${{ matrix.config.target_os }}-${{ hashFiles('.github/workflows/autobuild.yml', '.github/autobuild/windows.ps1', 'windows/deploy_windows.ps1') }}-${{ matrix.config.base_command }}
diff --git a/.github/workflows/bump-dependencies.yml b/.github/workflows/bump-dependencies.yml
index bd5e0dc1bf..6efc755b6b 100644
--- a/.github/workflows/bump-dependencies.yml
+++ b/.github/workflows/bump-dependencies.yml
@@ -50,11 +50,9 @@ jobs:
             # The following regex captures both the *nix and the Windows variable syntax (different case, underscore):
             local_version_regex: (.*QT[0-9_]+VERSION\s*=\s*"?)(6\.[0-9.]+)("?.*)
 
-          - name: choco-jack
+          - name: jack
             changelog_name: bundled JACK (Windows-only)
-            get_upstream_version: |
-              curl -s -o /dev/null --location --range 0-5 --write-out '%{url_effective}' https://community.chocolatey.org/api/v2/package/jack/ |
-                grep -oP '.*/jack\.\K.*(?=\.nupkg)'
+            get_upstream_version: GH_REPO=jackaudio/jack2-releases gh release view --json tagName --jq .tagName | sed -re 's/^v//'
             local_version_regex: (.*JackVersion\s*=\s*"?)([0-9.]+)("?.*)
 
           - name: choco-jom