diff --git a/TODO.md b/TODO.md
index 570b8b4..5066499 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,5 +1,5 @@
 * play with <sys/tree.h> instead of home made tree funcs
-* add argument to list previous/arbitraty days
+* pass parameters to list previous/arbitrary days
 * easier past task management than `date -d <date> +%s && vim ~/.ttime`
 * add some more complex task description (i.e: task@project)
 * use task@project to group task in reports