diff --git a/_output.yml b/_output.yml
index 4723de5d..f5fceeaf 100644
--- a/_output.yml
+++ b/_output.yml
@@ -1,6 +1,7 @@
 bookdown::gitbook:
   css: assets/style.css
   includes:
+    in_header: GA_Script.Rhtml
     before_body: assets/big-image_fhdasl.html
     after_body: assets/footer.html
   highlight: tango
@@ -19,4 +20,4 @@ bookdown::gitbook:
     sharing: false
 bookdown::pdf_book:
   keep_tex: true
-  
\ No newline at end of file
+