diff --git a/doc/Expr.adoc b/doc/Expr.adoc
index a9a9810..206e257 100644
--- a/doc/Expr.adoc
+++ b/doc/Expr.adoc
@@ -34,7 +34,7 @@ Expressions calculator
 
 toc::[]
 
-#TODO: Work in progress (last update on 2026/04/15, 6:02 p.m.)#
+#TODO: Work in progress (last update on 2026/04/21, 6:49 p.m.)#
 
 == Expr
 _Expr_ is a GO package that can analyze, interpret and calculate expressions.