diff --git a/go.mod b/go.mod
index 943ee2d..db432a3 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.19
 
 require (
 	github.com/sacloud/ftps v1.1.0
-	github.com/sacloud/iaas-api-go v1.8.0
+	github.com/sacloud/iaas-api-go v1.8.1
 	github.com/sacloud/packages-go v0.0.7
 	github.com/stretchr/testify v1.8.1
 	golang.org/x/crypto v0.0.0-20220214200702-86341886e292
diff --git a/go.sum b/go.sum
index 4201c99..1324524 100644
--- a/go.sum
+++ b/go.sum
@@ -53,8 +53,8 @@ github.com/sacloud/ftps v1.1.0 h1:cYv+b6qhrIT8msfx64XXRJzbv5S+Dqwb/rXa5Y641XA=
 github.com/sacloud/ftps v1.1.0/go.mod h1:h4awhOi3PEyhKLj1FpXjoVV5yVkmRUU+d5L95EwX2JU=
 github.com/sacloud/go-http v0.1.3 h1:t+RADgwS5QgnMKlbggjwbXv01UEuXp0/9fV0xulYEeY=
 github.com/sacloud/go-http v0.1.3/go.mod h1:4LwFHG5N/599baV0JSuAQO5e3atHXx0Jb9322PrIoHo=
-github.com/sacloud/iaas-api-go v1.8.0 h1:xjSyCeiAmsn7DsTqsthGS8b7RruPGj3nE1tteZ07O5U=
-github.com/sacloud/iaas-api-go v1.8.0/go.mod h1:OQTd66RoiiGKrLbyXYBvYZmQCOJUTeArjkOADIGZB4M=
+github.com/sacloud/iaas-api-go v1.8.1 h1:ot9qppeGLI0PFj+KStT4te8mo89HUCXgWbaINIzyw8Y=
+github.com/sacloud/iaas-api-go v1.8.1/go.mod h1:OQTd66RoiiGKrLbyXYBvYZmQCOJUTeArjkOADIGZB4M=
 github.com/sacloud/packages-go v0.0.7 h1:Py6nksUuyoRBaHtPfpA9sTIxSKnQfce/xm7XkiCLZmQ=
 github.com/sacloud/packages-go v0.0.7/go.mod h1:NlADopH0g9pLGDHJLi1geDgQpZBN9w4Rl1ucvmiDwAI=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=