diff --git a/go.mod b/go.mod
index a869023b..3a1e1878 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.18
 require (
 	github.com/Hsn723/certspotter-client v1.1.0
 	github.com/aws/aws-sdk-go v1.44.191
-	github.com/cybozu-go/log v1.6.1
+	github.com/cybozu-go/log v1.7.0
 	github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21
 	github.com/emersion/go-smtp v0.15.1-0.20220315104156-8c3df8a6b249
 	github.com/google/uuid v1.3.0
diff --git a/go.sum b/go.sum
index 39b42272..0f781c08 100644
--- a/go.sum
+++ b/go.sum
@@ -81,8 +81,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:ma
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/cybozu-go/log v1.6.1 h1:m5cllWuOckvyLpH3TJAOMC76dydP6fVFjtrU/9NhQUA=
-github.com/cybozu-go/log v1.6.1/go.mod h1:U342hYYWUxWPOw0g5EhiS5BaO/c8c5YT+A14xQRbEd8=
+github.com/cybozu-go/log v1.7.0 h1:wPTkNDWcnSLLAv1ejFSn07qvYG8ng6U6Gygv04dYW1w=
+github.com/cybozu-go/log v1.7.0/go.mod h1:pwWH0DFLY85XgTEI6nqkDAvmGReEBDu2vmlkU7CpudQ=
 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=