diff --git a/Dockerfile b/Dockerfile
index 094bb9e..2b7cfc9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,7 @@ RUN apt-get update && apt-get install -y \
   echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
   apt-get update && apt-get install -y nodejs yarn sqlite3 cron
 
+ENV RACK_ENV production
 
 WORKDIR /code
 COPY . /code