diff --git a/.golangci.yml b/.golangci.yml
index dc7c960..9d27331 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -4,7 +4,10 @@ linters:
   disable:
     - depguard
     - funlen
+    - goconst
     - godox
+    - gomodguard
+    - gomodguard_v2
     - exhaustruct
     - nlreturn
     - nonamedreturns
diff --git a/debug_test.go b/debug_test.go
index 6f6547b..af99d1e 100644
--- a/debug_test.go
+++ b/debug_test.go
@@ -38,7 +38,7 @@ func TestDebug(t *testing.T) {
 	Debug = false
 	_ = tmpFile.Close()
 
-	flushed, _ := os.Open(tmpName) //nolint:gosec // test file, path is from os.CreateTemp
+	flushed, _ := os.Open(tmpName)
 	buf := make([]byte, 500)
 	_, _ = flushed.Read(buf)
 	specLogger.SetOutput(os.Stdout)
diff --git a/header.go b/header.go
index 599ba2c..f656e07 100644
--- a/header.go
+++ b/header.go
@@ -150,7 +150,11 @@ func (h Header) MarshalJSON() ([]byte, error) {
 	if err != nil {
 		return nil, err
 	}
-	return jsonutils.ConcatJSON(b1, b2, b3), nil
+	b4, err := json.Marshal(h.VendorExtensible)
+	if err != nil {
+		return nil, err
+	}
+	return jsonutils.ConcatJSON(b1, b2, b3, b4), nil
 }
 
 // UnmarshalJSON unmarshals this header from JSON.
diff --git a/header_test.go b/header_test.go
index ad34da3..e6e0b1a 100644
--- a/header_test.go
+++ b/header_test.go
@@ -75,6 +75,7 @@ const headerJSON = `{
 
 func TestIntegrationHeader(t *testing.T) {
 	assert.JSONUnmarshalAsT(t, header, headerJSON)
+	assert.JSONMarshalAsT(t, headerJSON, header)
 }
 
 func TestJSONLookupHeader(t *testing.T) {
diff --git a/schema_loader.go b/schema_loader.go
index 0894c93..1e34606 100644
--- a/schema_loader.go
+++ b/schema_loader.go
@@ -117,7 +117,7 @@ func (r *schemaLoader) updateBasePath(transitive *schemaLoader, basePath string)
 
 func (r *schemaLoader) resolveRef(ref *Ref, target any, basePath string) error {
 	tgt := reflect.ValueOf(target)
-	if tgt.Kind() != reflect.Ptr {
+	if tgt.Kind() != reflect.Pointer {
 		return ErrResolveRefNeedsAPointer
 	}