diff --git a/packaging/linux/portmaster.service b/packaging/linux/portmaster.service
index 81574193..34c45ce0 100644
--- a/packaging/linux/portmaster.service
+++ b/packaging/linux/portmaster.service
@@ -15,6 +15,7 @@ RestartSec=10
 RestartPreventExitStatus=24
 LockPersonality=yes
 MemoryDenyWriteExecute=yes
+MemoryLow=2G
 NoNewPrivileges=yes
 PrivateTmp=yes
 PIDFile=/var/lib/portmaster/core-lock.pid