diff --git a/samy.ps1 b/samy.ps1
index 8519abc..4a051d2 100644
--- a/samy.ps1
+++ b/samy.ps1
@@ -2693,9 +2693,17 @@ function Install-DattoRMM {
                 $whHeaders.SAMYPW = $WebhookPassword
             }
 
-            $resp = Invoke-RestMethod -Uri $WebhookUrl `
-                                    -Headers $whHeaders `
-                                    -Method GET
+           $irmParams = @{
+                Uri         = $WebhookUrl
+                Method      = 'Get'
+                ErrorAction = 'Stop'
+                ContentType = 'application/json'
+            }
+
+            if ($whHeaders.Count -gt 0) { $irmParams.Headers = $whHeaders }
+
+            $resp = Invoke-RestMethod @irmParams
+
 
             $ApiUrl       = $resp.ApiUrl
             $ApiKey       = $resp.ApiKey
@@ -2734,7 +2742,17 @@ function Install-DattoRMM {
     # 4) Fetch site list only
     if ($FetchSites) {
         try {
-            $sitesResp = Invoke-RestMethod -Uri "$ApiUrl/api/v2/account/sites" -Method Get -Headers $headers
+            $irmParams = @{
+                Uri         = "$ApiUrl/api/v2/account/sites"
+                Method      = 'Get'
+                ErrorAction = 'Stop'
+                ContentType = 'application/json'
+            }
+
+            if ($headers.Count -gt 0) { $irmParams.Headers = $headers }
+
+            $sitesResp = Invoke-RestMethod @irmParams
+
             $siteList = $sitesResp.sites | Sort-Object name | ForEach-Object {
                 [PSCustomObject]@{ Name = $_.name; UID = $_.uid }
             }