diff --git a/Makefile b/Makefile
index c6f84c45fcd3bdea41342c7a8927f65ff74aa82c..513383788df0b77afe9230941c400099ba8308a2 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ HTMLOPTIONS += -t html5
 HTMLOPTIONS += -c css/tufte-css/tufte.css
 HTMLOPTIONS += --self-contained
 
-all: command_line.pdf delaunay.pdf pointeurs_avances.pdf oral.pdf ligne_commande.pdf strings.pdf tests_assertions.pdf make.pdf base_3.pdf base_2.pdf base_1.pdf intro.pdf index.html 
+all: command_line.pdf delaunay.pdf pointeurs_avances.pdf oral.pdf ligne_commande.pdf strings.pdf tests_assertions.pdf make.pdf base_4.pdf base_3.pdf base_2.pdf base_1.pdf intro.pdf index.html 
 
 intro.pdf: intro.md metadata.yaml
 	pandoc $(PDFOPTIONS) -o $@ $^
@@ -24,6 +24,9 @@ base_2.pdf: base_2.md metadata.yaml
 base_3.pdf: base_3.md metadata.yaml
 	pandoc $(PDFOPTIONS) -o $@ $^
 
+base_4.pdf: base_4.md metadata.yaml
+	pandoc $(PDFOPTIONS) -o $@ $^
+
 make.pdf: make.md metadata.yaml
 	pandoc $(PDFOPTIONS) -o $@ $^