diff --git a/introduction.tex b/introduction.tex
index 056b6f8..f2e53cc 100644
--- a/introduction.tex
+++ b/introduction.tex
@@ -2,7 +2,7 @@
 %% Modified from the KIT-Design by SDQ in February 2025
 %% See https://sdq.kastel.kit.edu/wiki/Dokumentvorlagen
 %% Modified by: Hedongliang Liu
-%% Last modified on: 14.08.2025
+%% Last modified on: 23.10.2025
 %%%%%%%%%%% CEL beamer class %%%%%%%%%%%%%%%
 \documentclass[overviewatsection, showsubsectionsatfirstoverview]{CELbeamer} 
 %% default options: en, helvet, bigfoot (12pt)