diff --git a/util/header.go b/util/header.go
index 4279e98..90dd8c6 100644
--- a/util/header.go
+++ b/util/header.go
@@ -90,9 +90,9 @@ func generateHeader(path string, tmpl []byte) []byte {
 	case ".php":
 		header = doGenerate(tmpl, "", "// ", "")
 		put(header, []string{".php"})
-	case ".j2":
+	case ".j2", ".twig":
 		header = doGenerate(tmpl, "{#", "", "#}")
-		put(header, []string{".j2"})
+		put(header, []string{".j2", ".twig"})
 	case ".ml", ".mli", ".mll", ".mly":
 		header = doGenerate(tmpl, "(**", "   ", "*)")
 		put(header, []string{".ml", ".mli", ".mll", ".mly"})