diff --git a/metropolis/installer/main.go b/metropolis/installer/main.go
index 6d3fc6d..5481c3f 100644
--- a/metropolis/installer/main.go
+++ b/metropolis/installer/main.go
@@ -217,7 +217,7 @@
 	installParams := osimage.Params{
 		PartitionSize: osimage.PartitionSizeInfo{
 			// ESP is the size of the node ESP partition, expressed in mebibytes.
-			ESP: 128,
+			ESP: 384,
 			// System is the size of the node system partition, expressed in
 			// mebibytes.
 			System: 4096,