diff --git a/conf/librephotos.env b/conf/librephotos.env
index 59ef586..a2fe721 100644
--- a/conf/librephotos.env
+++ b/conf/librephotos.env
@@ -20,6 +20,8 @@ DEBUG=0
 SECRET_KEY=__SECRET_KEY__
 MAPBOX_API_KEY=
 
+HEAVYWEIGHT_PROCESS=1
+
 httpPort=__PORT__
 IMAGE_SIMILARITY_SERVER_PORT=__SIMILARITY_PORT__
 MPLCONFIGDIR=__DATA_PATH__/matplotlib