diff --git a/labs/config/config.controller b/labs/config/config.controller
index fdfa4651..45bad5b2 100644
--- a/labs/config/config.controller
+++ b/labs/config/config.controller
@@ -11,3 +11,6 @@ FOURTH_OCTET=51
 NET_IF_0=nat
 NET_IF_1=MGMT_NET
 NET_IF_2=API_NET
+
+# Controller is running most of the services; it needs more than 512 MB RAM
+VM_MEM=1024