diff --git a/docker/docker-compose-rest.yml b/docker/docker-compose-rest.yml
index 64e1865083b..8699b664bea 100644
--- a/docker/docker-compose-rest.yml
+++ b/docker/docker-compose-rest.yml
@@ -129,7 +129,7 @@ services:
       precreate-core suggestion /opt/solr/server/solr/configsets/suggestion
       cp -r /opt/solr/server/solr/configsets/suggestion/* suggestion
       chown -R solr:solr /var/solr
-      runuser -u solr -- solr-foreground
+      runuser -u solr -- env SOLR_HEAP="${SOLR_HEAP:-4g}" solr-foreground
 volumes:
   assetstore:
   pgdata: