diff --git a/rootfs/etc/confd/templates/run.tmpl b/rootfs/etc/confd/templates/run.tmpl
index d54944b..75d8271 100644
--- a/rootfs/etc/confd/templates/run.tmpl
+++ b/rootfs/etc/confd/templates/run.tmpl
@@ -1,4 +1,4 @@
 #!/usr/bin/with-contenv sh
 
 cd /var/lib/minecraft
-exec s6-setuidgid minecraft java -Xms{{getenv "MIN_RAM"}} -Xmx{{getenv "MAX_RAM" }} -jar /var/lib/minecraft/spigot.jar
+exec s6-setuidgid minecraft java -Xms{{getenv "MIN_RAM" "512M"}} -Xmx{{getenv "MAX_RAM" "512M"}} -jar /var/lib/minecraft/spigot.jar