diff --git a/main.tex b/main.tex
index e0b2a92..8105cac 100644
--- a/main.tex
+++ b/main.tex
@@ -45,6 +45,8 @@ Martijn Remmen
 \newcommand{\versie}{CONCEPT}
 %% }
 
+\usepackage{pgfgantt}
+\usepackage{pdflscape}
 
 \usepackage{multirow}
 \usepackage{tikz}