diff --git a/src/addoncreator/Addon/AddonFile.cs b/src/addoncreator/Addon/AddonFile.cs
index 4af6005..1dacf46 100644
--- a/src/addoncreator/Addon/AddonFile.cs
+++ b/src/addoncreator/Addon/AddonFile.cs
@@ -81,7 +81,7 @@ namespace GarrysMod.AddonCreator.Addon
             var stream = File.OpenRead(path);
 
             {
-                var sr = new BinaryReader(stream, Encoding.GetEncoding("windows-1252"));
+                var sr = new BinaryReader(stream, Encoding.GetEncoding("iso-8859-1"));
 
                 // Check format header
                 if (!sr.ReadBytes(4).SequenceEqual(FormatIdent)
@@ -260,7 +260,7 @@ namespace GarrysMod.AddonCreator.Addon
             using (var stream = new MemoryStream())
             {
                 // TODO: Standardized encoding - Garry should use standardized encoding, currently he uses Encoding.Default which is applocale-dependent...
-                var sw = new BinaryWriter(stream, Encoding.GetEncoding("windows-1252"));
+                var sw = new BinaryWriter(stream, Encoding.GetEncoding("iso-8859-1"));
 
                 // Format header
                 sw.Write(FormatIdent);
diff --git a/src/addoncreator/Extensions.cs b/src/addoncreator/Extensions.cs
index 3ecab82..8bf5c75 100644
--- a/src/addoncreator/Extensions.cs
+++ b/src/addoncreator/Extensions.cs
@@ -38,7 +38,7 @@ namespace GarrysMod.AddonCreator
             }
 
             value += "\0";
-            bw.Write(Encoding.GetEncoding("windows-1252").GetBytes(value));
+            bw.Write(Encoding.GetEncoding("iso-8859-1").GetBytes(value));
         }
     }
 }
\ No newline at end of file