diff --git a/css/tufte.css b/css/tufte-css/tufte.css
similarity index 100%
rename from css/tufte.css
rename to css/tufte-css/tufte.css
diff --git a/slides/Makefile b/slides/Makefile
index 245cbb098efa39bb3a39e7d9c6ccf7a28b318edb..f56e0edad71b6514a0b079a42ccc5935c9d62384 100644
--- a/slides/Makefile
+++ b/slides/Makefile
@@ -48,7 +48,7 @@ index.md: gen_index.sh
 	$(shell ./gen_index.sh)
 
 index.html: index.md
-	pandoc -s $(OPTIONS) --css ../css/tufte.css -o $@ $^
+	pandoc -s $(OPTIONS) --css ../css/tufte-css/tufte.css -o $@ $^
 
 deploy: all index.html
 	mkdir -p prog_seq_c_cours