diff --git a/pkg/workers/document/document_worker.go b/pkg/workers/document/document_worker.go
index 13853c2a..bf214679 100644
--- a/pkg/workers/document/document_worker.go
+++ b/pkg/workers/document/document_worker.go
@@ -127,7 +127,7 @@ func (d *Worker) process(ctx context.Context, b *bytes.Buffer, n *manifest.Node)
 		fullContent = append(fullContent, dc)
 	}
 
-	if fullContent[0].docAst.Kind() == ast.KindDocument {
+	if fullContent[0].docAst != nil && fullContent[0].docAst.Kind() == ast.KindDocument {
 		firstDoc := fullContent[0].docAst.(*ast.Document)
 		docs := []frontmatter.NodeMeta{}
 		for _, astNode := range fullContent {