diff --git a/zstd.go b/zstd.go
index a54d2569b4..15ab2463d0 100644
--- a/zstd.go
+++ b/zstd.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/klauspost/compress/zstd"
 	"github.com/valyala/bytebufferpool"
+
 	"github.com/valyala/fasthttp/stackless"
 )
 
@@ -149,7 +150,7 @@ func nonblockingWriteZstd(ctxv any) {
 
 // AppendZstdBytes appends zstd src to dst and returns the resulting dst.
 func AppendZstdBytes(dst, src []byte) []byte {
-	return AppendZstdBytesLevel(dst, src, CompressBrotliDefaultCompression)
+	return AppendZstdBytesLevel(dst, src, CompressZstdDefault)
 }
 
 // WriteUnzstd writes unzstd p to w and returns the number of uncompressed
diff --git a/zstd_test.go b/zstd_test.go
index dc0c45f339..620ef7d708 100644
--- a/zstd_test.go
+++ b/zstd_test.go
@@ -38,7 +38,7 @@ func testZstdBytesSingleCase(s string) error {
 	if !bytes.Equal(ZstdpedS[:len(prefix)], prefix) {
 		return fmt.Errorf("unexpected prefix when compressing %q: %q. Expecting %q", s, ZstdpedS[:len(prefix)], prefix)
 	}
-
+            
 	unZstdedS, err := AppendUnzstdBytes(prefix, ZstdpedS[len(prefix):])
 	if err != nil {
 		return fmt.Errorf("unexpected error when uncompressing %q: %w", s, err)