diff --git a/go.mod b/go.mod
index 15ef654..f4305db 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/sue445/zatsu_monitor
 
 require (
 	github.com/bluele/slack v0.0.0-20170929071952-fb5cadcf9ed2
-	github.com/davecgh/go-spew v1.1.0
+	github.com/davecgh/go-spew v1.1.1
 	github.com/golang/snappy v0.0.0-20170215233205-553a64147049
 	github.com/griffin-stewie/go-chatwork v0.0.0-20170127153634-a03aef7b22a6
 	github.com/joho/godotenv v0.0.0-20170328200154-325433c502d4
diff --git a/go.sum b/go.sum
index 9e2fce1..43f1fe9 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,8 @@ github.com/bluele/slack v0.0.0-20170929071952-fb5cadcf9ed2 h1:AZMvNzZTAf0VWlW/4M
 github.com/bluele/slack v0.0.0-20170929071952-fb5cadcf9ed2/go.mod h1:W679Ri2W93VLD8cVpEY/zLH1ow4zhJcCyjzrKxfM3QM=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/golang/snappy v0.0.0-20170215233205-553a64147049 h1:K9KHZbXKpGydfDN0aZrsoHpLJlZsBrGMFWbgLDGnPZk=
 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/griffin-stewie/go-chatwork v0.0.0-20170127153634-a03aef7b22a6 h1:fREyWzm1je4B2ijT0MKgKqkwVfmOkjuYuu5Zf3kzRxo=