diff --git a/html.go b/html.go
index 0c83ea0..9642ec3 100644
--- a/html.go
+++ b/html.go
@@ -101,7 +101,7 @@ type HTML struct {
 	tocMarker    int
 	headerCount  int
 	currentLevel int
-	toc          *bytes.Buffer
+	toc          bytes.Buffer
 
 	// Track header IDs to prevent ID collision in a single generation.
 	headerIDs map[string]int
@@ -152,10 +152,6 @@ func NewHTMLRenderer(params HTMLRendererParameters) Renderer {
 		closeTag:   closeTag,
 		parameters: params,
 
-		headerCount:  0,
-		currentLevel: 0,
-		toc:          new(bytes.Buffer),
-
 		headerIDs: make(map[string]int),
 
 		w: writer,
diff --git a/markdown.go b/markdown.go
index 95dff1e..2783381 100644
--- a/markdown.go
+++ b/markdown.go
@@ -351,7 +351,7 @@ func MarkdownBasic(input []byte) []byte {
 	})
 
 	// set up the parser
-	return Markdown(input, renderer, Options{Extensions: 0})
+	return Markdown(input, renderer, Options{})
 }
 
 // Call Markdown with most useful extensions enabled