diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/AbilityMimic.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/AbilityMimic.xml
index a0f12b4..b06be25 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/AbilityMimic.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/AbilityMimic.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="us-ascii"?>
+<?xml version="1.0" encoding="UTF-8"?>
 
 <!-- ======================================================== -->
 <!-- This file is generated via "npm run build:mimicabilities" -->
@@ -10,7 +10,7 @@
 <!-- Such as "Ultimate1Unlocked" for ultimates -->
 <!-- Please also manually add the behavior to the units. -->
 
-<Catalog>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
 
 <!-- ///////////////////////////////////-->
 <!-- Start Abilities in {mods/heroes.stormmod/base.stormmaps/maps/heroes/singleplayermaps/startingexperience/tutorialveteran.stormmap/base.stormdata/GameData/AbilData.xml}-->
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/BehaviorMimic.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/BehaviorMimic.xml
index f270ae1..0a70dbc 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/BehaviorMimic.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/BehaviorMimic.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="us-ascii" standalone="no"?>
+<?xml version="1.0" encoding="UTF-8"?>
 
 <!-- ======================================================== -->
 <!-- This file is generated via "npm run build:mimicbehaviors" -->
@@ -10,7 +10,7 @@
 <!-- such as "PermaBlind" to "MBPermablind" -->
 <!-- And add the behavior to selected units, such as with chat command "addbehavior" (adb MBPermaBlind). -->
 
-<Catalog>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
   <CBehaviorAbility id="MBGraveGolemMegaStunCastScan">
     <Buttons Face="MBGraveGolemMegaStunCastScan_ToggleOn" Type="AbilCmd" AbilCmd="MBGraveGolemMegaStunCastScan_AbilBehavior,On"/>
     <Buttons Face="MBGraveGolemMegaStunCastScan_ToggleOff" Type="AbilCmd" AbilCmd="MBGraveGolemMegaStunCastScan_AbilBehavior,Off"/>
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/IconGlowing.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/IconGlowing.xml
index 67611fd..ea41bb9 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/IconGlowing.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/IconGlowing.xml
@@ -1,5 +1,5 @@
-<?xml version="1.0" encoding="us-ascii"?>
-<Catalog>
+<?xml version="1.0" encoding="UTF-8"?>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
 
   <!-- This file enabled the glowing icons (e.g when Zuljin D active) on Q W E R D buttons -->
   <!-- To have a button glowing, simply add the following behaviors (e.g using tools such as "adb" chat command): -->
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/ModelMimic.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/ModelMimic.xml
index 942ccb5..3b6a302 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/ModelMimic.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/ModelMimic.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="us-ascii" standalone="no"?>
+<?xml version="1.0" encoding="UTF-8"?>
 
 <!-- ======================================================== -->
 <!-- This file is generated via "npm run build:mimicmodels" -->
@@ -7,7 +7,7 @@
 <!-- That allow a model to be spawned as a Unit. -->
 <!-- To prevent collision, all Mimic Models Unit's id will have prefixed "UN" -->
 
-<Catalog>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
   <CUnit id="UN_t" parent="StormHero">
     <BehaviorArray Link="PermaInvulnerable"/>
     <WeaponArray Link="FootmanMinion"/>
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/PermaArmor.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/PermaArmor.xml
index 8d06874..935a7ef 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/PermaArmor.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/PermaArmor.xml
@@ -1,5 +1,5 @@
-<?xml version="1.0" encoding="us-ascii"?>
-<Catalog>
+<?xml version="1.0" encoding="UTF-8"?>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
 
   <!-- This file enables applying a permanent armor by adding the behavior of: -->
 
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/TestHero.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/TestHero.xml
index 9fb5368..e9b94d6 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/TestHero.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/HeroesMod/TestHero.xml
@@ -1,5 +1,5 @@
-<?xml version="1.0" encoding="us-ascii"?>
-<Catalog>
+<?xml version="1.0" encoding="UTF-8"?>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
   <!-- This file does absolutely nothing but for testing the Generate XML tool.
   As well as force git to upload the empty directory.
   You can delete this file at any will and do a "npm run build:xml"
diff --git a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/SystemMod/TestSystem.xml b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/SystemMod/TestSystem.xml
index 9fb5368..e9b94d6 100644
--- a/(10)trymemode.stormmap/base.stormdata/Mods/GameData/SystemMod/TestSystem.xml
+++ b/(10)trymemode.stormmap/base.stormdata/Mods/GameData/SystemMod/TestSystem.xml
@@ -1,5 +1,5 @@
-<?xml version="1.0" encoding="us-ascii"?>
-<Catalog>
+<?xml version="1.0" encoding="UTF-8"?>
+<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">
   <!-- This file does absolutely nothing but for testing the Generate XML tool.
   As well as force git to upload the empty directory.
   You can delete this file at any will and do a "npm run build:xml"
diff --git a/scripts/main/buildmimicabilities.js b/scripts/main/buildmimicabilities.js
index 7d85fd7..117a9bf 100644
--- a/scripts/main/buildmimicabilities.js
+++ b/scripts/main/buildmimicabilities.js
@@ -9,7 +9,7 @@ const XMLFiles = HeroesFiles.ReadEach(HeroesFiles.AllXMLs);
 
 const idPrefix = 'M';
 
-let finalXML = '<?xml version="1.0" encoding="us-ascii"?>\n\n';
+let finalXML = '<?xml version="1.0" encoding="UTF-8"?>\n\n';
 finalXML += '<!-- ======================================================== -->\n';
 finalXML += '<!-- This file is generated via "npm run build:mimicabilities" -->\n';
 finalXML += '<!-- ======================================================== -->\n';
@@ -21,7 +21,8 @@ finalXML += '<!-- To prevent collision, all Mimic Abilities\' id will have prefi
 finalXML += '<!-- Some Abilities required a specific behavior to be unlocked, which will shown next to the ability below. -->\n';
 finalXML += '<!-- Such as "Ultimate1Unlocked" for ultimates -->\n';
 finalXML += '<!-- Please also manually add the behavior to the units. -->\n';
-finalXML += '\n<Catalog>\n';
+// eslint-disable-next-line max-len
+finalXML += '\n<Catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd">\n';
 
 XMLFiles.forEach((obj) => {
   XMLParser(obj.fileData, (err, result) => {
diff --git a/scripts/main/helper/buildmimicXML.js b/scripts/main/helper/buildmimicXML.js
index 1c9f19c..8c90b59 100644
--- a/scripts/main/helper/buildmimicXML.js
+++ b/scripts/main/helper/buildmimicXML.js
@@ -28,12 +28,17 @@ module.exports = (configParam) => {
     rootName: 'Catalog',
     xmldec: {
       version: '1.0',
-      encoding: 'us-ascii',
-      standalone: false,
+      encoding: 'UTF-8',
     },
   });
 
-  const mainObj = {};
+  const mainObj = {
+    $: {
+      'xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
+      // eslint-disable-next-line max-len
+      'xsi:noNamespaceSchemaLocation': 'https://raw.githubusercontent.com/jamiephan/HeroesOfTheStorm_Gamedata/master/xsd/latest.xsd',
+    },
+  };
 
   if (!(config.generation.pre === null || typeof config.generation.pre === 'undefined')) {
     config.generation.pre.forEach((o) => {