diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8054d5a..111d623 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,7 +29,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- For any bug fix.
+- Fixed offline repository descriptors serializing `PrivateData.PSData` as the
+  string `System.Collections.Hashtable` when packaging a prerelease module.
 
 ### Security
 
diff --git a/RequiredModules.psd1 b/RequiredModules.psd1
index 863732b..e191995 100644
--- a/RequiredModules.psd1
+++ b/RequiredModules.psd1
@@ -16,6 +16,7 @@
     PSScriptAnalyzer            = 'latest'
     Pester                      = 'latest'
     ModuleBuilder               = 'latest'
+    Metadata                    = 'latest'
     ChangelogManagement         = 'latest'
     Sampler                     = 'latest'
     'Sampler.GitHubTasks'       = 'latest'
diff --git a/source/Private/New-UniversalAutomationRepositoryManifest.ps1 b/source/Private/New-UniversalAutomationRepositoryManifest.ps1
index e7c7d1b..ecf7229 100644
--- a/source/Private/New-UniversalAutomationRepositoryManifest.ps1
+++ b/source/Private/New-UniversalAutomationRepositoryManifest.ps1
@@ -48,11 +48,10 @@ function New-UniversalAutomationRepositoryManifest
         ''
     }
 
-    $manifestParameters = @{
-        Path              = $Path
+    $manifestData = [ordered] @{
         RootModule        = $Module.Name
         ModuleVersion     = $versionPart
-        Guid              = (New-Guid)
+        GUID              = (New-Guid).ToString()
         Author            = $Module.Author
         CompanyName       = $Module.CompanyName
         Copyright         = $Module.Copyright
@@ -65,11 +64,7 @@ function New-UniversalAutomationRepositoryManifest
 
     if (-not [System.String]::IsNullOrWhiteSpace($prereleasePart))
     {
-        # Use PrivateData.PSData.Prerelease instead of the -Prerelease parameter because
-        # New-ModuleManifest only gained -Prerelease in PowerShell 6.0. PrivateData works
-        # identically on Windows PowerShell 5.1 and PowerShell 7, and is the same location
-        # PowerShellGet/PSResourceGet store the prerelease tag in the resulting manifest.
-        $manifestParameters['PrivateData'] = @{
+        $manifestData['PrivateData'] = @{
             PSData = @{
                 Prerelease = $prereleasePart
             }
@@ -78,6 +73,12 @@ function New-UniversalAutomationRepositoryManifest
 
     if ($PSCmdlet.ShouldProcess($Path, 'Create PowerShell Universal repository manifest'))
     {
-        New-ModuleManifest @manifestParameters
+        $exportMetadataParameters = @{
+            Path        = $Path
+            InputObject = $manifestData
+            AsHashtable = $true
+        }
+
+        Export-Metadata @exportMetadataParameters
     }
 }
diff --git a/source/Sampler.PowerShellUniversalTasks.psd1 b/source/Sampler.PowerShellUniversalTasks.psd1
index 03b97a4..1fab90f 100644
--- a/source/Sampler.PowerShellUniversalTasks.psd1
+++ b/source/Sampler.PowerShellUniversalTasks.psd1
@@ -51,7 +51,9 @@ PowerShellVersion = '5.0'
 # ProcessorArchitecture = ''
 
 # Modules that must be imported into the global environment prior to importing this module
-RequiredModules = @()
+RequiredModules = @(
+    'Metadata'
+)
 
 # Assemblies that must be loaded prior to importing this module
 # RequiredAssemblies = @()
@@ -137,4 +139,3 @@ PrivateData = @{
 
 
 
-
diff --git a/tests/Unit/Private/New-UniversalAutomationRepositoryManifest.Tests.ps1 b/tests/Unit/Private/New-UniversalAutomationRepositoryManifest.Tests.ps1
index 6f5918b..d7a7d79 100644
--- a/tests/Unit/Private/New-UniversalAutomationRepositoryManifest.Tests.ps1
+++ b/tests/Unit/Private/New-UniversalAutomationRepositoryManifest.Tests.ps1
@@ -25,31 +25,36 @@ AfterAll {
 }
 
 Describe 'New-UniversalAutomationRepositoryManifest' {
-    BeforeAll {
-        Mock -CommandName New-ModuleManifest
-    }
-
     It 'Should create the repository descriptor for the module' {
+        $manifestPath = Join-Path -Path $TestDrive -ChildPath 'MyModule.psd1'
+
         InModuleScope -ScriptBlock {
             $module = New-Module -Name 'MyModule' -ScriptBlock { }
 
             New-UniversalAutomationRepositoryManifest -Path $ManifestPath -Module $module -ModuleVersion '1.2.3-preview1' -Confirm:$false
-        } -Parameters @{ ManifestPath = (Join-Path -Path $TestDrive -ChildPath 'MyModule.psd1') }
-
-        Should -Invoke -CommandName New-ModuleManifest -Exactly -Times 1 -Scope It -ParameterFilter {
-            $RootModule -eq 'MyModule' -and $ModuleVersion -eq '1.2.3' -and $PrivateData.PSData.Prerelease -eq 'preview1'
-        }
+        } -Parameters @{ ManifestPath = $manifestPath }
+
+        $manifest = Import-PowerShellDataFile -Path $manifestPath
+        $manifest.RootModule | Should -Be 'MyModule'
+        $manifest.ModuleVersion.ToString() | Should -Be '1.2.3'
+        $manifest.PrivateData | Should -BeOfType [System.Collections.Hashtable]
+        $manifest.PrivateData.PSData | Should -BeOfType [System.Collections.Hashtable]
+        $manifest.PrivateData.PSData.Prerelease | Should -Be 'preview1'
+        Get-Content -Path $manifestPath -Raw | Should -Not -Match "PSData\s*=\s*'System.Collections.Hashtable'"
     }
 
     It 'Should create the repository descriptor without a prerelease tag when the version has none' {
+        $manifestPath = Join-Path -Path $TestDrive -ChildPath 'MyModule.psd1'
+
         InModuleScope -ScriptBlock {
             $module = New-Module -Name 'MyModule' -ScriptBlock { }
 
             New-UniversalAutomationRepositoryManifest -Path $ManifestPath -Module $module -ModuleVersion '1.2.3' -Confirm:$false
-        } -Parameters @{ ManifestPath = (Join-Path -Path $TestDrive -ChildPath 'MyModule.psd1') }
+        } -Parameters @{ ManifestPath = $manifestPath }
 
-        Should -Invoke -CommandName New-ModuleManifest -Exactly -Times 1 -Scope It -ParameterFilter {
-            $RootModule -eq 'MyModule' -and $ModuleVersion -eq '1.2.3' -and -not $PrivateData
-        }
+        $manifest = Import-PowerShellDataFile -Path $manifestPath
+        $manifest.RootModule | Should -Be 'MyModule'
+        $manifest.ModuleVersion.ToString() | Should -Be '1.2.3'
+        $manifest.ContainsKey('PrivateData') | Should -BeFalse
     }
 }