diff --git a/Dockerfile b/Dockerfile
index 9da7c98..4931bff 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM python:3.7.13-slim-buster
 
 RUN apt-get update -y
 RUN apt install gcc g++ git wget -y
-RUN apt-get install ffmpeg libsm6 libxext6  -
+RUN apt-get install ffmpeg libsm6 libxext6  -y
 RUN pip install setuptools cython numpy
 
 WORKDIR /workspace