diff --git a/assignments/01/ues1_pflug_isabell.tex b/assignments/01/ues1_pflug_isabell.tex
index bef2287..26bc101 100644
--- a/assignments/01/ues1_pflug_isabell.tex
+++ b/assignments/01/ues1_pflug_isabell.tex
@@ -27,6 +27,7 @@
 \usepackage{mathtools}
 \usepackage{amsxtra,amssymb,amsthm,amstext,amsfonts}
 \usepackage{thmtools}
+\usepackage{calrsfs} % for changing \mathcal to beauty
 \usepackage{physics}
 \usepackage{xpatch} % for fixing thmtools