diff --git a/src/functions/public/Auth/Assert-GitHubContext.ps1 b/src/functions/public/Auth/Assert-GitHubContext.ps1
index e53b67ae..76776d86 100644
--- a/src/functions/public/Auth/Assert-GitHubContext.ps1
+++ b/src/functions/public/Auth/Assert-GitHubContext.ps1
@@ -22,7 +22,7 @@
 
         # The required authtypes for the command.
         [Parameter(Mandatory)]
-        [string[]] $AuthType
+        [GitHubAuthType[]] $AuthType
     )
 
     $command = (Get-PSCallStack)[1].Command