diff --git a/requirements.txt b/requirements.txt
index ad41f31..7c3dcb2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ geoip2>=4.8
 psutil>=5.9
 simple-websocket>=1.0
 gunicorn>=22.0
+hachoir>=3.3