diff --git a/Dockerfile b/Dockerfile
index 75a88af..23fb1a5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,8 @@ RUN curl -sL https://deb.nodesource.com/setup_14.x | bash - && \
 RUN mkdir /app
 WORKDIR /app
 
+EXPOSE 3000
+
 COPY Gemfile* package.json yarn.lock /app/
 
 RUN gem install bundler -v 2.1.4 && \