diff --git a/deployment/legacy-migration/maintenance-worker/migration/mongo/.env b/deployment/legacy-migration/maintenance-worker/migration/mongo/.env
index 602f51fc4..4c5f9e18c 100644
--- a/deployment/legacy-migration/maintenance-worker/migration/mongo/.env
+++ b/deployment/legacy-migration/maintenance-worker/migration/mongo/.env
@@ -12,5 +12,6 @@
 # On Windows this resolves to C:\Users\dornhoeschen\AppData\Local\Temp\mongo-export (MinGW)
 EXPORT_PATH='/tmp/mongo-export/'
 EXPORT_MONGOEXPORT_BIN='mongoexport'
+MONGO_EXPORT_SPLIT_SIZE=100
 # On Windows use something like this
-# EXPORT_MONGOEXPORT_BIN='C:\Program Files\MongoDB\Server\3.6\bin\mongoexport.exe'
\ No newline at end of file
+# EXPORT_MONGOEXPORT_BIN='C:\Program Files\MongoDB\Server\3.6\bin\mongoexport.exe'
diff --git a/deployment/legacy-migration/maintenance-worker/migration/mongo/export.sh b/deployment/legacy-migration/maintenance-worker/migration/mongo/export.sh
index 339a5bd64..abed9b0f5 100755
--- a/deployment/legacy-migration/maintenance-worker/migration/mongo/export.sh
+++ b/deployment/legacy-migration/maintenance-worker/migration/mongo/export.sh
@@ -10,7 +10,7 @@ set +o allexport
 function export_collection () {
   "${EXPORT_MONGOEXPORT_BIN}" --db ${MONGODB_DATABASE} --host localhost -d ${MONGODB_DATABASE} --port 27018 --username ${MONGODB_USERNAME} --password ${MONGODB_PASSWORD} --authenticationDatabase ${MONGODB_AUTH_DB} --collection $1  --collection $1 --out "${EXPORT_PATH}$1.json"
   mkdir -p ${EXPORT_PATH}splits/$1/
-  split -l 100 -a 3 ${EXPORT_PATH}$1.json ${EXPORT_PATH}splits/$1/
+  split -l ${MONGO_EXPORT_SPLIT_SIZE} -a 3 ${EXPORT_PATH}$1.json ${EXPORT_PATH}splits/$1/
 }
 
 # Delete old export & ensure directory
diff --git a/docker-compose.maintenance.yml b/docker-compose.maintenance.yml
index 113b4492c..4ff307594 100644
--- a/docker-compose.maintenance.yml
+++ b/docker-compose.maintenance.yml
@@ -30,6 +30,7 @@ services:
       - "MONGODB_AUTH_DB=${MONGODB_AUTH_DB}"
       - "MONGODB_DATABASE=${MONGODB_DATABASE}"
       - "UPLOADS_DIRECTORY=${UPLOADS_DIRECTORY}"
+      - "MONGO_EXPORT_SPLIT_SIZE=${MONGO_EXPORT_SPLIT_SIZE}"
     ports:
       - 7687:7687
       - 7474:7474