diff --git a/galton.tex b/galton.tex
index 4c41e46..d9527d8 100644
--- a/galton.tex
+++ b/galton.tex
@@ -2,6 +2,7 @@
 \usepackage[a4paper]{geometry}
 \geometry{top=3cm,bottom=3cm,left=3cm,right=3.5cm}
 \usepackage[ngerman]{babel}
+\usepackage{pgfplots}
 
 \usepackage{Matheclub}