diff --git a/src/session--composition-and-inheritance/preamble.tex b/src/session--composition-and-inheritance/preamble.tex
index 966a8ce..abb5edf 100644
--- a/src/session--composition-and-inheritance/preamble.tex
+++ b/src/session--composition-and-inheritance/preamble.tex
@@ -15,6 +15,7 @@
 \usepackage{fontawesome5}
 \usepackage{hyperref}
 \usepackage[normalem]{ulem}
+\usepackage{fontspec}
 
 \IfFileExists{ecsquare.sty}{\usepackage{ecsquare}}{}