diff --git a/go.mod b/go.mod
index d5b00e1..6c3a662 100644
--- a/go.mod
+++ b/go.mod
@@ -4,5 +4,5 @@ go 1.15
 
 require (
 	github.com/aws/aws-sdk-go v1.37.11
-	github.com/kayac/go-config v0.5.1
+	github.com/kayac/go-config v0.6.0
 )
diff --git a/go.sum b/go.sum
index c1e3bfa..140a75c 100644
--- a/go.sum
+++ b/go.sum
@@ -10,8 +10,8 @@ github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9Y
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
-github.com/kayac/go-config v0.5.1 h1:TbqadCm/HQeXtTJ6WnozpldBtm8KKfucPM+5tL/KCP8=
-github.com/kayac/go-config v0.5.1/go.mod h1:5C4ZN+sMjYpEX0bi+AcgF6g0hZYVdzZiV16TEyzAzfk=
+github.com/kayac/go-config v0.6.0 h1:Y4l9tsWrUCvT1id8tbO4aT4SdGxbYqd8lqSe5l1GrK0=
+github.com/kayac/go-config v0.6.0/go.mod h1:5C4ZN+sMjYpEX0bi+AcgF6g0hZYVdzZiV16TEyzAzfk=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=