diff --git a/presentation/Makefile b/presentation/Makefile
index 5942e41..a81a37a 100644
--- a/presentation/Makefile
+++ b/presentation/Makefile
@@ -2,7 +2,13 @@ latex=xelatex
 pdflatex=xelatex
 bibtex=bibtex 
 
-graph_pngs= graphs/valid_graph.png
+graph_pngs= graphs/valid_graph.png \
+			graphs/clear_vop_01.png \
+			graphs/clear_vop_02.png \
+			graphs/clear_vop_03.png \
+			graphs/clear_vop_04.png \
+			graphs/clear_vop_05.png \
+			graphs/clear_vop_06.png