diff --git a/.gitignore b/.gitignore
index 04ac529..305f4b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 cache/
 docs
 *.log
+*_files/
+*.bak
diff --git a/demo/Rmd/ca.Rmd b/demo/Rmd/ca.Rmd
index 4e530e8..a4016a5 100644
--- a/demo/Rmd/ca.Rmd
+++ b/demo/Rmd/ca.Rmd
@@ -4,6 +4,7 @@
   html_document:
     css: style.css
     keep_md: yes
+    self_contained: false
 ---
 
 ```{r setup, include=FALSE}