diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fb9232d8..7c84c8e3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        go_version: [1.18]
+        go_version: [1.18.x]
     steps:
 
     - name: Set up Go 1.x
diff --git a/context/problem.go b/context/problem.go
index b70a427e..b5203545 100644
--- a/context/problem.go
+++ b/context/problem.go
@@ -231,6 +231,9 @@ func (p Problem) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
 		return err
 	}
 
+	// toTitle := cases.Title(language.English)
+	// toTitle.String(k)
+
 	for k, v := range p {
 		// convert keys like "type" to "Type", "productName" to "ProductName" and e.t.c. when xml.
 		err = e.Encode(xmlMapEntry{XMLName: xml.Name{Local: strings.Title(k)}, Value: v})