diff --git a/vendor/github.com/mattn/go-runewidth/go.mod b/vendor/github.com/mattn/go-runewidth/go.mod
new file mode 100644
index 0000000..8a9d524
--- /dev/null
+++ b/vendor/github.com/mattn/go-runewidth/go.mod
@@ -0,0 +1,5 @@
+module github.com/mattn/go-runewidth
+
+go 1.9
+
+require github.com/rivo/uniseg v0.1.0