diff --git a/Program.cs b/Program.cs
index cb1b2e5..f093eba 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.IO;
+using System.Security;
 using System.Speech.Synthesis;
 using System.Text.RegularExpressions;
 using NAudio.Wave;
@@ -491,7 +492,7 @@ private static async Task<string> BuildSsml(string p)
         string ssml = @"
 <speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>
     <voice name='" + _ss.Voice + @"'>
-            " + p + @"
+            " + SecurityElement.Escape(p) + @"
     </voice>
 </speak>";
         return ssml;