diff --git a/build.ps1 b/build.ps1
index 23d52232..68c47f49 100644
--- a/build.ps1
+++ b/build.ps1
@@ -1,5 +1,5 @@
 param(
-    [string] $VersionPrefix = "4.4.0",
+    [string] $VersionPrefix = "4.4.1",
     [string] $VersionSuffix = $null
 )
 
diff --git a/src/Setup/Program.cs b/src/Setup/Program.cs
index d3ee5ebc..d0d1d832 100644
--- a/src/Setup/Program.cs
+++ b/src/Setup/Program.cs
@@ -5,7 +5,7 @@ class Script
 {
     static public void Main(string[] args)
     {
-        var version = "4.4.0";
+        var version = "4.4.1";
 
         try
         {
diff --git a/src/TEdit/TEdit.csproj b/src/TEdit/TEdit.csproj
index 65ec84c2..ffbae3d1 100644
--- a/src/TEdit/TEdit.csproj
+++ b/src/TEdit/TEdit.csproj
@@ -9,7 +9,7 @@
     <DefaultNamespace>TEdit</DefaultNamespace>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
-    <VersionPrefix>4.4.0</VersionPrefix>
+    <VersionPrefix>4.4.1</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <Platforms>AnyCPU</Platforms>
     <ApplicationManifest>app.manifest</ApplicationManifest>
diff --git a/src/TEdit/Terraria/World.FileV2.cs b/src/TEdit/Terraria/World.FileV2.cs
index 735e39ff..2c4796a4 100644
--- a/src/TEdit/Terraria/World.FileV2.cs
+++ b/src/TEdit/Terraria/World.FileV2.cs
@@ -513,6 +513,7 @@ public static int SaveHeaderFlags(World world, BinaryWriter bw)
             bw.Write(world.GameMode);
             bw.Write(world.DrunkWorld);
             bw.Write(world.GoodWorld);
+            bw.Write(world.TenthAnniversaryWorld);
             bw.Write(world.CreationTime);
             bw.Write((byte)world.MoonType);
             bw.Write(world.TreeX0);