diff --git a/CHANGELOG.md b/CHANGELOG.md
index 919a0ffd..a7bbd830 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   to be `ubuntu-latest` - Fixes [Issue #422](https://github.com/PlagueHO/CosmosDB/issues/422).
 - Updated PSScriptAnalyzer tests to be skipped when PowerShell Core
   version is less than 7.0.3 - Fixes [Issue #431](https://github.com/PlagueHO/CosmosDB/issues/431).
+- Updated the New-CosmosDbAccount command to add a new Capability parameter - Fixes [Issue #439](https://github.com/PlagueHO/CosmosDB/issues/439).
 
 ### Added
 
diff --git a/docs/New-CosmosDbAccount.md b/docs/New-CosmosDbAccount.md
index ccc77195..de9d9148 100644
--- a/docs/New-CosmosDbAccount.md
+++ b/docs/New-CosmosDbAccount.md
@@ -16,7 +16,7 @@ Create a new Cosmos DB account in Azure.
 ```powershell
 New-CosmosDbAccount [-Name] <String> [-ResourceGroupName] <String> [-Location] <String>
  [[-LocationRead] <String[]>] [[-DefaultConsistencyLevel] <String>] [[-MaxIntervalInSeconds] <Int32>]
- [[-MaxStalenessPrefix] <Int32>] [[-IpRangeFilter] <String[]>] [[-AllowedOrgin] <String[]>]
+ [[-MaxStalenessPrefix] <Int32>] [[-IpRangeFilter] <String[]>] [[-Capability] <String[]>] [[-AllowedOrgin] <String[]>]
 [-AsJob] [-WhatIf] [-Confirm]
  [<CommonParameters>]
 ```
@@ -86,6 +86,17 @@ Resource Group caled 'MyData'. The account will be created in the
 'WestUS' Azure region. The Cosmos DB will have the CORS allowed
 origins set to 'https://www.contoso.com' and 'https://www.fabrikam.com'.
 
+### Example 6
+
+```powershell
+PS C:\> New-CosmosDbAccount -Name 'MyCosmosDB' -ResourceGroup 'MyData' -Location 'WestUS' -Capability @('EnableCassandra', 'EnableServerless')
+```
+
+Create a new Cosmos DB account called 'MyCosmosDB' in an existing
+Resource Group caled 'MyData'. The account will be created in the
+'WestUS' Azure region. The Cosmos DB will be provisioned in the
+Serverless capacity mode with the Cassandra API.
+
 ## PARAMETERS
 
 ### -AllowedOrigin
@@ -123,6 +134,28 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -Capability
+
+The capabilities of the database account. Only one API type should
+be used.
+For more information see https://docs.microsoft.com/en-us/azure/templates/microsoft.documentdb/databaseaccounts?tabs=json#capability.
+
+If one of the API type's is not specified, the Core (SQL) API type
+will be used.
+
+```yaml
+Type: String[]
+Parameter Sets: (All)
+Aliases:
+Accepted values: EnableCassandra, EnableTable, EnableGremlin, EnableServerless
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -Confirm
 
 Prompts you for confirmation before running the cmdlet.
diff --git a/source/Public/accounts/New-CosmosDbAccount.ps1 b/source/Public/accounts/New-CosmosDbAccount.ps1
index 311b5cbd..b3a4dd08 100644
--- a/source/Public/accounts/New-CosmosDbAccount.ps1
+++ b/source/Public/accounts/New-CosmosDbAccount.ps1
@@ -47,6 +47,11 @@ function New-CosmosDbAccount
         [System.String[]]
         $IpRangeFilter = @(),
 
+        [Parameter()]
+        [ValidateSet('EnableCassandra', 'EnableTable', 'EnableGremlin', 'EnableServerless')]
+        [System.String[]]
+        $Capability,
+
         [Parameter()]
         [ValidateNotNullOrEmpty()]
         [System.String[]]
@@ -91,6 +96,20 @@ function New-CosmosDbAccount
         ipRangeFilter            = ($IpRangeFilter -join ',')
     }
 
+    if ($PSBoundParameters.ContainsKey('Capability'))
+    {
+        $capabilityObject = @()
+        foreach ($param in $Capability) {
+            $capabilityObject += @{
+                name = $param
+            }
+        }
+
+        $cosmosDBProperties += @{
+            capabilities = $capabilityObject
+        }
+    }
+
     if ($PSBoundParameters.ContainsKey('AllowedOrigin'))
     {
         $corsObject = @(
@@ -109,6 +128,7 @@ function New-CosmosDbAccount
     $null = $PSBoundParameters.Remove('MaxIntervalInSeconds')
     $null = $PSBoundParameters.Remove('MaxStalenessPrefix')
     $null = $PSBoundParameters.Remove('IpRangeFilter')
+    $null = $PSBoundParameters.Remove('Capability')
     $null = $PSBoundParameters.Remove('AllowedOrigin')
 
     $newAzResource_parameters = $PSBoundParameters + @{
diff --git a/tests/Unit/CosmosDB.accounts.Tests.ps1 b/tests/Unit/CosmosDB.accounts.Tests.ps1
index 696ab395..34e6c6db 100644
--- a/tests/Unit/CosmosDB.accounts.Tests.ps1
+++ b/tests/Unit/CosmosDB.accounts.Tests.ps1
@@ -24,6 +24,7 @@ InModuleScope $ProjectName {
     $script:testConsistencyLevel = 'Strong'
     $script:testMaxIntervalInSeconds = 60
     $script:testMaxStalenessPrefix = 900
+    $script:testCapability = @('EnableServerless', 'EnableCassandra')
     $script:testCorsAllowedOrigins = @('https://www.contoso.com', 'https://www.fabrikam.com')
     $script:mockGetAzResource = @{
         ResourceId = 'ignore'
@@ -76,7 +77,14 @@ InModuleScope $ProjectName {
                     allowedOrigins = ($script:testCorsAllowedOrigins -join ',')
                 }
             )
-            capabilities                  = @()
+            capabilities                  = @(
+                @{
+                    name = $script:testCapability[0]
+                },
+                @{
+                    name = $script:testCapability[1]
+                }
+            )
             ResourceGroupName             = $script:testResourceGroupName
             ResourceType                  = 'Microsoft.DocumentDB/databaseAccounts'
             Sku                           = $null
@@ -709,6 +717,78 @@ InModuleScope $ProjectName {
                     -Exactly -Times 1
             }
         }
+
+        Context 'When called with a Location specified and the EnableServerless and EnableCassandra capabilities' {
+            $script:result = $null
+            $testCosmosDBProperties = @{
+                databaseAccountOfferType = 'Standard'
+                locations                = @(
+                    @{
+                        locationName     = $script:testLocation
+                        failoverPriority = 0
+                    }
+                )
+                consistencyPolicy        = @{
+                    defaultConsistencyLevel = 'Session'
+                    maxIntervalInSeconds    = 5
+                    maxStalenessPrefix      = 100
+                }
+                ipRangeFilter            = ''
+                capabilities             = @(
+                    @{
+                        name = 'EnableServerless'
+                    },
+                    @{
+                        name = 'EnableCassandra'
+                    }
+                )
+            }
+
+            $newAzResource_parameterFilter = {
+                ($ResourceType -eq 'Microsoft.DocumentDb/databaseAccounts') -and `
+                ($ApiVersion -eq '2015-04-08') -and `
+                ($ResourceName -eq $script:testName) -and `
+                ($ResourceGroupName -eq $script:testResourceGroupName) -and `
+                ($Location -eq $script:testLocation) -and `
+                ($Force -eq $true) -and `
+                ($Properties.databaseAccountOfferType -eq $testCosmosDBProperties.databaseAccountOfferType) -and `
+                ($Properties.locations[0].locationName -eq $testCosmosDBProperties.locations[0].locationName) -and `
+                ($Properties.locations[0].failoverPriority -eq $testCosmosDBProperties.locations[0].failoverPriority) -and `
+                ($Properties.consistencyPolicy.defaultConsistencyLevel -eq $testCosmosDBProperties.consistencyPolicy.defaultConsistencyLevel) -and `
+                ($Properties.consistencyPolicy.maxStalenessPrefix -eq $testCosmosDBProperties.consistencyPolicy.maxStalenessPrefix) -and `
+                ($Properties.consistencyPolicy.maxIntervalInSeconds -eq $testCosmosDBProperties.consistencyPolicy.maxIntervalInSeconds) -and `
+                ($Properties.ipRangeFilter -eq $testCosmosDBProperties.ipRangeFilter) -and `
+                ($Properties.capabilities[0].name -eq $testCosmosDBProperties.capabilities[0].name) -and `
+                ($Properties.capabilities[1].name -eq $testCosmosDBProperties.capabilities[1].name)
+            }
+
+            Mock `
+                -CommandName New-AzResource `
+                -MockWith { 'Account' }
+
+            It 'Should not throw exception' {
+                $newCosmosDbAccountParameters = @{
+                    Name              = $script:testName
+                    ResourceGroupName = $script:testResourceGroupName
+                    Location          = $script:testLocation
+                    Capability        = $script:testCapability
+                    Verbose           = $true
+                }
+
+                { $script:result = New-CosmosDbAccount @newCosmosDbAccountParameters } | Should -Not -Throw
+            }
+
+            It 'Should return expected result' {
+                $script:result | Should -Be 'Account'
+            }
+
+            It 'Should call expected mocks' {
+                Assert-MockCalled `
+                    -CommandName New-AzResource `
+                    -ParameterFilter $newAzResource_parameterFilter `
+                    -Exactly -Times 1
+            }
+        }
     }
 
     Describe 'Set-CosmosDbAccount' -Tag 'Unit' {