diff --git a/client.go b/client.go
index e5271ab..7d5e0aa 100644
--- a/client.go
+++ b/client.go
@@ -16,7 +16,7 @@ import (
 	"time"
 )
 
-const Version = "0.3.0"
+const Version = "0.4.0"
 
 type Logger interface {
 	Printf(format string, args ...any)
diff --git a/types.go b/types.go
index 5eeddad..691fbec 100644
--- a/types.go
+++ b/types.go
@@ -165,6 +165,7 @@ type PriceEstimate struct {
 
 const (
 	InstanceChangeEIPAdd       = "eip_add"
+	InstanceChangeEIPReplace   = "eip_replace"
 	InstanceChangeVolumeCreate = "volume_create"
 	InstanceChangeVolumeExpand = "volume_expand"
 	InstanceChangeRebuildImage = "rebuild_image"