diff --git a/Dockerfile b/Dockerfile
index 5af2fc2..d999999 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM ruby:2.6.2-alpine
-RUN apk add build-base tzdata sqlite sqlite-dev && gem install tzinfo-data
+RUN apk add build-base tzdata sqlite sqlite-dev postgresql-dev && gem install tzinfo-data
 WORKDIR /app
 COPY Gemfile /app/Gemfile
 COPY Gemfile.lock /app/Gemfile.lock