diff --git a/shiroha-server/src/main/java/io/nanachiyo0721/shiroha/data/BufferedLinearRegionFile.java b/shiroha-server/src/main/java/io/nanachiyo0721/shiroha/data/BufferedLinearRegionFile.java
index 2555fb9..a6a30db 100644
--- a/shiroha-server/src/main/java/io/nanachiyo0721/shiroha/data/BufferedLinearRegionFile.java
+++ b/shiroha-server/src/main/java/io/nanachiyo0721/shiroha/data/BufferedLinearRegionFile.java
@@ -81,7 +81,7 @@ public class BufferedLinearRegionFile implements io.nanachiyo0721.shiroha.data.R
     private static final int SECTOR_META_SIZE = Integer.BYTES + Long.BYTES + Integer.BYTES;
 
     // all three are stateless and thread-safe
-    private static final LZ4Compressor LZ4_COMPRESSOR = LZ4Factory.fastestInstance().fastCompressor();
+    private static final LZ4Compressor LZ4_COMPRESSOR = LZ4Factory.fastestInstance().highCompressor();
     private static final LZ4FastDecompressor LZ4_DECOMPRESSOR = LZ4Factory.fastestInstance().fastDecompressor();
     private static final XXHash32 XX_HASH_32 = XXHashFactory.fastestInstance().hash32();