diff --git a/go.mod b/go.mod
index 6391a10..4df77b8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module git.purser.it/roypur/stoken
 
-go 1.17
+go 1.18
 
-require github.com/ugorji/go/codec v1.2.6
+require github.com/ugorji/go/codec v1.2.7 // indirect
diff --git a/go.sum b/go.sum
index ff77558..47dea88 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-github.com/ugorji/go v1.2.6 h1:tGiWC9HENWE2tqYycIqFTNorMmFRVhNwCpDOpWqnk8E=
-github.com/ugorji/go v1.2.6/go.mod h1:anCg0y61KIhDlPZmnH+so+RQbysYVyDko0IMgJv0Nn0=
-github.com/ugorji/go/codec v1.2.6 h1:7kbGefxLoDBuYXOms4yD7223OpNMMPNPZxXk5TvFcyQ=
-github.com/ugorji/go/codec v1.2.6/go.mod h1:V6TCNZ4PHqoHGFZuSG1W8nrCzzdgA2DozYxWFFpvxTw=
+github.com/ugorji/go v1.2.7 h1:qYhyWUUd6WbiM+C6JZAUkIJt/1WrjzNHY9+KCIjVqTo=
+github.com/ugorji/go v1.2.7/go.mod h1:nF9osbDWLy6bDVv/Rtoh6QgnvNDpmCalQV5urGCCS6M=
+github.com/ugorji/go/codec v1.2.7 h1:YPXUKf7fYbp/y8xloBqZOw2qaVggbfwMlI8WM3wZUJ0=
+github.com/ugorji/go/codec v1.2.7/go.mod h1:WGN1fab3R1fzQlVQTkfxVtIBhWDRqOviHU95kRgeqEY=
diff --git a/sign.go b/sign.go
index a19305c..cc6bf0a 100644
--- a/sign.go
+++ b/sign.go
@@ -52,7 +52,7 @@ func (tc TokenCoder) SeedHex() string {
 }
 
 func Format(token string) (txt string, err error) {
-	var payload any
+	var payload interface{}
 	var data []byte
 	data, err = b64.DecodeString(strings.TrimFunc(token, trim))
 	if err != nil {