diff --git a/latex/thesis/thesis.tex b/latex/thesis/thesis.tex
index 28684a0..03c773f 100644
--- a/latex/thesis/thesis.tex
+++ b/latex/thesis/thesis.tex
@@ -34,6 +34,7 @@
 \usetikzlibrary{external}
 \usetikzlibrary{spy}
 \usetikzlibrary{shapes.geometric}
+\usetikzlibrary{arrows.meta,arrows}
 
 \pgfplotsset{compat=newest}
 \usepgfplotslibrary{colorbrewer}