diff --git a/Solutions/Marain.Tenancy.Deployment/Marain-PreDeploy.ps1 b/Solutions/Marain.Tenancy.Deployment/Marain-PreDeploy.ps1
index 34090e1..275e818 100644
--- a/Solutions/Marain.Tenancy.Deployment/Marain-PreDeploy.ps1
+++ b/Solutions/Marain.Tenancy.Deployment/Marain-PreDeploy.ps1
@@ -57,7 +57,8 @@ Function MarainDeployment([MarainServiceDeploymentContext] $ServiceDeploymentCon
 
             $ServiceDeploymentContext.InstanceContext.TenantAdminAppId = $newSp.AppId
             $ServiceDeploymentContext.InstanceContext.TenantAdminObjectId = $newSp.Id
-            Set-AzKeyVaultSecret -VaultName $keyVaultName -Name $tenantAdminSecretName -SecretValue $newSp.PasswordCredentials[0].SecretText | Out-Null
+            $spSecret = ConvertTo-SecureString $newSp.PasswordCredentials[0].SecretText -AsPlainText
+            Set-AzKeyVaultSecret -VaultName $keyVaultName -Name $tenantAdminSecretName -SecretValue $spSecret | Out-Null
         }
     }
     else {