diff --git a/src/DotRecast.Detour.TileCache/Io/Compress/FastLzTileCacheCompressor.cs b/src/DotRecast.Detour.TileCache/Io/Compress/FastLzTileCacheCompressor.cs
index cd52c1d..be66a3c 100644
--- a/src/DotRecast.Detour.TileCache/Io/Compress/FastLzTileCacheCompressor.cs
+++ b/src/DotRecast.Detour.TileCache/Io/Compress/FastLzTileCacheCompressor.cs
@@ -19,7 +19,6 @@ freely, subject to the following restrictions:
 */
 
 using DotRecast.Core;
-using K4os.Compression.LZ4;
 
 namespace DotRecast.Detour.TileCache.Io.Compress
 {
diff --git a/src/DotRecast.Detour.TileCache/Io/Compress/TileCacheCompressorFactory.cs b/src/DotRecast.Detour.TileCache/Io/Compress/TileCacheCompressorFactory.cs
index 65a1111..462fafb 100644
--- a/src/DotRecast.Detour.TileCache/Io/Compress/TileCacheCompressorFactory.cs
+++ b/src/DotRecast.Detour.TileCache/Io/Compress/TileCacheCompressorFactory.cs
@@ -20,7 +20,7 @@ freely, subject to the following restrictions:
 
 namespace DotRecast.Detour.TileCache.Io.Compress
 {
-    public class TileCacheCompressorFactory
+    public static class TileCacheCompressorFactory
     {
         public static TileCacheCompressor get(bool cCompatibility)
         {