diff --git a/Dockerfile b/Dockerfile
index 4dad968..fd91920 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ENV LANG=C.UTF-8
 
 
 RUN apt-get update \
- && apt-get install -y --no-install-recommends \
+ && apt-get install --no-install-recommends --yes \
       imagemagick \
       python3.7 \
       zip \