diff --git a/go.mod b/go.mod
index 08af830..40d1a6f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,7 @@
 module janouch.name/ell
 
+go 1.17
+
 require github.com/peterh/liner v1.1.0
+
+require github.com/mattn/go-runewidth v0.0.3 // indirect