diff --git a/go.mod b/go.mod
index dea22763..97833ad8 100644
--- a/go.mod
+++ b/go.mod
@@ -8,7 +8,7 @@ require (
 	github.com/go-test/deep v1.0.4
 	github.com/golang/mock v1.3.1
 	github.com/google/wire v0.3.0
-	github.com/int128/oauth2cli v1.7.0
+	github.com/int128/oauth2cli v1.8.1
 	github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4
 	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
 	github.com/spf13/cobra v0.0.5
diff --git a/go.sum b/go.sum
index fe4d6e6e..47e1fa7c 100644
--- a/go.sum
+++ b/go.sum
@@ -31,6 +31,7 @@ github.com/google/btree v0.0.0-20160524151835-7d79101e329e/go.mod h1:lNA+9X1NB3Z
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf h1:+RRA9JqSOZFfKrOeqr2z77+8R2RKyh8PG66dcu1V0ck=
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/google/subcommands v1.0.1/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
@@ -47,8 +48,12 @@ github.com/imdario/mergo v0.3.5 h1:JboBksRwiiAJWvIYJVo46AfV+IAIKZpfrSzVKj42R4Q=
 github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/int128/listener v1.0.0 h1:a9H3m4jbXgXpxJUK3fxWrh37Iic/UU/kYOGE0WtjbbI=
+github.com/int128/listener v1.0.0/go.mod h1:sho0rrH7mNRRZH4hYOYx+xwRDGmtRndaUiu2z9iumes=
 github.com/int128/oauth2cli v1.7.0 h1:lguQEIJ4IcSFRTqQ6y7avnfvPqVe0U6dlkW8mC1Epts=
 github.com/int128/oauth2cli v1.7.0/go.mod h1:bucNn0/es9IhOf0a2MWPvJ5xO5f6JYrCfitQTyjI5lA=
+github.com/int128/oauth2cli v1.8.1 h1:Vkmfx0w225l4qUpJ1ZWGw1elw7hnXAybSiYoYyh1iBw=
+github.com/int128/oauth2cli v1.8.1/go.mod h1:MkxKWhHUaPOaq/92Z5ifdCWySAKJKo04hUXaKA7OgDE=
 github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be h1:AHimNtVIpiBjPUhEF5KNCkrUyqTSA5zWUl8sQ2bfGBE=
 github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=