diff --git a/updates.txt b/updates.txt
index c8f3a870..1b5e2438 100644
--- a/updates.txt
+++ b/updates.txt
@@ -101,3 +101,7 @@ Install ripdrag:
 cargo install ripdrag
 
 your zshrc has ~/.cargo/bin added to the $PATH variable to use ripdrag
+
+Set difftastic as git diff default:
+
+git config --global diff.external difft