diff --git a/Install-ManagementAgent.ps1 b/Install-ManagementAgent.ps1
index 6252e9d..c53c14b 100644
--- a/Install-ManagementAgent.ps1
+++ b/Install-ManagementAgent.ps1
@@ -30,7 +30,10 @@ If ( $CUSTOMER_ID )
         }
 
         ## Setup security and certificate parameters to download from untrusted sources
-        [Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"
+        [Net.ServicePointManager]::SecurityProtocol = 
+            [Net.SecurityProtocolType]::Tls12 -bor `
+            [Net.SecurityProtocolType]::Tls11 -bor `
+            [Net.SecurityProtocolType]::Tls
         [System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
 
         ## Download the agent installer