diff --git a/Dockerfile b/Dockerfile
index 800894f..a8df6d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,3 +3,5 @@ RUN apk add postgresql-dev openldap-dev \
  && docker-php-ext-install pdo mbstring pdo_pgsql ldap
 
 WORKDIR /app
+COPY src/composer.json src/composer.lock /app/
+RUN composer install