diff --git a/go.mod b/go.mod
index 19a4b45..d248cd7 100644
--- a/go.mod
+++ b/go.mod
@@ -15,6 +15,6 @@ require (
 	github.com/octokit/go-octokit v0.4.1-0.20160312003706-812e91dfbd64 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/rakyll/gotest v0.0.0-20180125184505-86f0749cd8cc // indirect
-	github.com/tcnksm/ghr v0.12.1 // indirect
+	github.com/tcnksm/ghr v0.12.2 // indirect
 	golang.org/x/lint v0.0.0-20190409202823-959b441ac422 // indirect
 )
diff --git a/go.sum b/go.sum
index 458381c..452e4b0 100644
--- a/go.sum
+++ b/go.sum
@@ -158,6 +158,8 @@ github.com/tcnksm/ghr v0.12.0 h1:3dbJOU5/Nr6C1HeBWwOIvMsVt4/eOg2EQDAg11H0Y0Y=
 github.com/tcnksm/ghr v0.12.0/go.mod h1:2YSVCxP2GsVRnE6R3bZxEiVnpJ9GUkotqlq2No0kTMU=
 github.com/tcnksm/ghr v0.12.1 h1:oYNULfAztAbkKopO25yvj6p3vfJxQKsnbuPplVWnQII=
 github.com/tcnksm/ghr v0.12.1/go.mod h1:tcp6tzbRYE0LqFSG7ykXP/BVG1/2BkX6aIn9FFV1mIQ=
+github.com/tcnksm/ghr v0.12.2 h1:amE7jP1fUfKiobp/6Dvdu1FoGs6RuyI8wO4RHMaKXB8=
+github.com/tcnksm/ghr v0.12.2/go.mod h1:tcp6tzbRYE0LqFSG7ykXP/BVG1/2BkX6aIn9FFV1mIQ=
 github.com/tcnksm/go-gitconfig v0.1.2 h1:iiDhRitByXAEyjgBqsKi9QU4o2TNtv9kPP3RgPgXBPw=
 github.com/tcnksm/go-gitconfig v0.1.2/go.mod h1:/8EhP4H7oJZdIPyT+/UIsG87kTzrzM4UsLGSItWYCpE=
 github.com/tcnksm/go-latest v0.0.0-20170313132115-e3007ae9052e h1:IWllFTiDjjLIf2oeKxpIUmtiDV5sn71VgeQgg6vcE7k=
diff --git a/graphs.go b/graphs.go
index 1ec5bd5..252c549 100644
--- a/graphs.go
+++ b/graphs.go
@@ -44,7 +44,6 @@ type createGraphParam struct {
 type getGraphsCommand struct {
 	Username string `short:"u" long:"username" description:"User name of graph owner."`
 }
-type getGraphParam struct{}
 
 type graphSVGCommand struct {
 	Username string `short:"u" long:"username" description:"User name of graph owner."`
diff --git a/test_base.go b/test_base.go
index 2afd471..b0afc24 100644
--- a/test_base.go
+++ b/test_base.go
@@ -15,5 +15,4 @@ func prepare() (string, string, string, string) {
 func cleanup(beforeAPIBaseEnv string, beforeTokenEnv string) {
 	os.Setenv("PIXELA_API_BASE", beforeAPIBaseEnv)
 	os.Setenv("PIXELA_USER_TOKEN", beforeTokenEnv)
-	return
 }