diff --git a/docker-compose.yml b/docker-compose.yml
index daf4f10..dc8032f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -32,12 +32,13 @@ services:
         soft: 20480
         hard: 20480
     environment:
-      ES_HEAP_SIZE: "24m"
-      ES_JAVA_OPTS: "-server"
-      MAX_LOCKED_MEMORY: 20480
-      index.number_of_shards: 1
-      index.number_of_replicas: 0
-      network.tcp.block: 1
+      - "ES_JAVA_OPTS=-server -Xms24m -Xmx24m"
+      - "ES_HEAP_SIZE=24m"
+      - "MAX_LOCKED_MEMORY=20480"
+      - index.number_of_shards=1
+      - index.number_of_replicas=0
+      - network.tcp.block=1
+      - bootstrap.memory_lock=1
     expose:
       - "9200"
     networks: