diff --git a/bemani/utils/binutils.py b/bemani/utils/binutils.py
index c41e22d..86680fd 100644
--- a/bemani/utils/binutils.py
+++ b/bemani/utils/binutils.py
@@ -2,6 +2,7 @@ import argparse
 import sys
 
 from bemani.protocol.binary import BinaryEncoding
+from bemani.protocol.lz77 import Lz77
 
 
 def main() -> None:
@@ -16,6 +17,13 @@ def main() -> None:
         default=None,
         required=True,
     )
+    parser.add_argument(
+        "-c",
+        "--compressed",
+        help="File data is compressed with LZ77.",
+        action="store_true",
+        default=False,
+    )
     args = parser.parse_args()
 
     if args.infile == "-":
@@ -26,6 +34,9 @@ def main() -> None:
             packet = myfile.read()
             myfile.close()
 
+    if args.compressed:
+        packet = Lz77().decompress(packet)
+
     benc = BinaryEncoding()
     filexml = benc.decode(packet)
     print(filexml)