diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 05424ab..2ab05df 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '3.1'
+version: '2.1'
 
 services:
 
@@ -10,6 +10,7 @@ services:
         MONGO_INITDB_ROOT_PASSWORD: example
       ports:
         - 27017:27017
+      mem_limit: 200m
 
   mongo-express:
       image: mongo-express
@@ -20,4 +21,5 @@ services:
         ME_CONFIG_MONGODB_ADMINUSERNAME: root
         ME_CONFIG_MONGODB_ADMINPASSWORD: example
       depends_on:
-        - mongo
\ No newline at end of file
+        - mongo
+      mem_limit: 200m
\ No newline at end of file