diff --git a/render.go b/render.go
index 2356c27..d80a120 100644
--- a/render.go
+++ b/render.go
@@ -90,7 +90,7 @@ func (ar *AsciiRender) RenderOpts(str string, opt *RenderOptions) (string, error
 	// Foreach line of the font height
 	for curLine := 0; curLine < font.height; curLine++ {
 		// Add the current line of the char to the result
-		for i, _ := range chars {
+		for i := range chars {
 			result += chars[i].GetLine(curLine)
 		}
 		// A new line at the end