diff --git a/paper.tex b/paper.tex
index 1e3e7a9..59e9dbd 100644
--- a/paper.tex
+++ b/paper.tex
@@ -56,6 +56,7 @@
 \usepackage{algorithm}
 \usepackage[noend]{algpseudocode}
 \usepackage{hyphenat}
+\usepackage{mathtools}
 \usepackage[shortcuts]{extdash}
 
 \input{tex/setup.tex}