diff --git a/converter/converter.go b/converter/converter.go
index e2b04fd..0eabf11 100644
--- a/converter/converter.go
+++ b/converter/converter.go
@@ -128,7 +128,10 @@ func (c *Converter) Convert(files ...models.File) error {
 
 // Convert converts all given input files
 func (c *Converter) ConvertHtmls(htmls ...models.Html) error {
-	for _, h := range htmls {
+	for i, h := range htmls {
+		if c.progress != nil {
+			c.progress(i + 1)
+		}
 		if len(h.Html) == 0 {
 			return fmt.Errorf("no .html input provided")
 		} else if h.Output == "" || filepath.Ext(h.Output) != ".pdf" {