diff --git a/lib/tsm/common.ts b/lib/tsm/common.ts
index d45bc5f..86ede70 100644
--- a/lib/tsm/common.ts
+++ b/lib/tsm/common.ts
@@ -30,7 +30,7 @@
  */
 
 
-var EPSILON = 0.000001;
+let EPSILON = 0.000001;
 
 ///<reference path='./vec2.ts' />
 ///<reference path='./vec3.ts' />
diff --git a/tools/writePacketClasses.js b/tools/writePacketClasses.js
index c62fdda..fc96d2d 100644
--- a/tools/writePacketClasses.js
+++ b/tools/writePacketClasses.js
@@ -90,7 +90,7 @@ messages.forEach((message) =>
     classString += '    name = \''+message.name+'\';\n';
 
 
-    var flags = [];
+    let flags = [];
     message.flags.forEach((flag) =>
     {
        switch(flag.toUpperCase())