diff --git a/README.md b/README.md
index ec8bf89..4d2c158 100644
--- a/README.md
+++ b/README.md
@@ -206,7 +206,7 @@ module.exports = {
     // The file where the commit hashes will be stored
   , "path": "~/.git-stats"
 
-    // First day of the week
+    // [DEPRECATED] First day of the week https://github.com/IonicaBizau/git-stats/issues/121
   , first_day: "Sun"
 
     // This defaults to *one year ago*