diff --git a/src/Certificate/Test-CSCertificate.ps1 b/src/Certificate/Test-CSCertificate.ps1
index eee291c..6a7d0e2 100644
--- a/src/Certificate/Test-CSCertificate.ps1
+++ b/src/Certificate/Test-CSCertificate.ps1
@@ -20,7 +20,7 @@ function Test-CSCertificate {
     #>
 
     [CmdletBinding()]
-    [OutputType([boolean])]
+    [OutputType([bool])]
     param(
         [Parameter(Mandatory = $true)]
         [ValidateNotNullOrEmpty()]
diff --git a/src/Item/Test-CredentialStoreItem.ps1 b/src/Item/Test-CredentialStoreItem.ps1
index f62b634..cb7a205 100644
--- a/src/Item/Test-CredentialStoreItem.ps1
+++ b/src/Item/Test-CredentialStoreItem.ps1
@@ -37,7 +37,7 @@ function Test-CredentialStoreItem {
         }
     #>
     [CmdletBinding(DefaultParameterSetName = 'Private')]
-    [OutputType([boolean])]
+    [OutputType([bool])]
     param (
         [Parameter(Mandatory = $false, ParameterSetName = 'Shared')]
         [string]$Path = "{0}\PSCredentialStore\CredentialStore.json" -f $env:ProgramData,
diff --git a/src/Private/Resolve-Dependency.ps1 b/src/Private/Resolve-Dependency.ps1
index cf86b40..8b7cc77 100644
--- a/src/Private/Resolve-Dependency.ps1
+++ b/src/Private/Resolve-Dependency.ps1
@@ -40,7 +40,7 @@ function Resolve-Dependency {
         }
     #>
 
-    [OutputType([boolean])]
+    [OutputType([bool])]
     [CmdletBinding()]
     param (
         [Parameter(Mandatory = $true)]
diff --git a/src/Private/Test-CSPfxCertificate.ps1 b/src/Private/Test-CSPfxCertificate.ps1
index 7e16d53..da7575e 100644
--- a/src/Private/Test-CSPfxCertificate.ps1
+++ b/src/Private/Test-CSPfxCertificate.ps1
@@ -26,7 +26,7 @@ function Test-CSPfxCertificate {
     #>
 
     [CmdletBinding()]
-    [OutputType([boolean])]
+    [OutputType([bool])]
     param(
         [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
         [ValidateNotNullOrEmpty()]
diff --git a/src/Store/Test-CredentialStore.ps1 b/src/Store/Test-CredentialStore.ps1
index bc87442..7aeea67 100644
--- a/src/Store/Test-CredentialStore.ps1
+++ b/src/Store/Test-CredentialStore.ps1
@@ -19,7 +19,7 @@ function Test-CredentialStore {
 
     #>
     [CmdletBinding(DefaultParameterSetName = 'Private')]
-    [OutputBinding([boolean])]
+    [OutputBinding([bool])]
     param (
         [Parameter(Mandatory = $false, ParameterSetName = 'Shared')]
         [string]$Path,