diff --git a/settings/settings.tex b/settings/settings.tex
index c4b52f9..52d86fc 100644
--- a/settings/settings.tex
+++ b/settings/settings.tex
@@ -45,9 +45,10 @@
 \usepackage{longtable}
 \usepackage{graphicx}
 \usepackage{float}
+\usepackage{multicol}
 
 \usepackage{tikz}
-\usetikzlibrary{arrows,shapes}
+\usetikzlibrary{arrows,shapes,arrows.meta}
 \usepackage{xifthen}
 %commands
 \newcommand{\image}[4]{