diff --git a/Dockerfile b/Dockerfile
index fc5c4cd..bc6b3d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,3 +3,5 @@ FROM debian:10.4-slim
 RUN apt-get update && \
     apt-get install -y ffmpeg && \
     rm -rf /var/lib/apt/lists/*
+
+ENV LANG=C.UTF-8