diff --git a/bot.ps1 b/bot.ps1
index 329bf4c..1c15153 100755
--- a/bot.ps1
+++ b/bot.ps1
@@ -95,7 +95,7 @@ function Send-Pong {
         $OriginHomeServer,
 
         [Parameter(Mandatory=$true)]
-        [int]
+        [int64]
         $Duration,
         
         [Parameter(Mandatory=$true)]
@@ -453,4 +453,4 @@ function Start-MatrixSync {
 }
 
 
-Start-MatrixSync
\ No newline at end of file
+Start-MatrixSync