diff --git a/Dockerfile.mariadb b/Dockerfile.mariadb
index 6478a3d..db2eeb3 100644
--- a/Dockerfile.mariadb
+++ b/Dockerfile.mariadb
@@ -52,6 +52,7 @@ COPY composer.* /sync/
 COPY syncer /sync/syncer
 COPY sync /sync/sync
 COPY start.sh /sync/start.sh
+RUN composer install
 ENV PATH="/sync:${PATH}"
 RUN chmod +x /sync/sync /etc/service/*/run
 CMD ["start.sh"]
diff --git a/Dockerfile.postgres b/Dockerfile.postgres
index 9039be2..4735d6c 100644
--- a/Dockerfile.postgres
+++ b/Dockerfile.postgres
@@ -58,6 +58,7 @@ COPY sync /sync/sync
 COPY start.sh /sync/start.sh
 ENV PATH="/sync:${PATH}"
 CMD ["start.sh"]
+RUN composer install
 COPY postgres_healthcheck /sync/postgres_healthcheck
 HEALTHCHECK --start-period=30s CMD /sync/postgres_healthcheck
 RUN ln -s /sync/vendor/bin/wait-for-postgresql /usr/local/bin/wait-for-database