diff --git a/docker-compose.yml b/docker-compose.yml
index 80ad86e..fdc6281 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,7 +3,7 @@
 services:
     main-openhab:
       image: openhab/openhab:2.2.0-${OPENHAB_ARCH:-amd64}-debian
-      mem_limit: 2g
+      mem_limit: ${OPENHAB_MEMORY_LIMIT:-2g}
       restart: always
       tty: true
       logging:
diff --git a/openhab.conf.example b/openhab.conf.example
index 71ecd8c..b7b1827 100644
--- a/openhab.conf.example
+++ b/openhab.conf.example
@@ -23,3 +23,6 @@
 
 # language
 OPENHAB_LANG=de_DE.UTF-8
+
+# optional change memory limit
+#OPENHAB_MEMORY_LIMIT=2g