diff --git a/content/publication/SIS2021Berloco/index.md b/content/publication/SIS2021Berloco/index.md
index bf3642f..426c87b 100644
--- a/content/publication/SIS2021Berloco/index.md
+++ b/content/publication/SIS2021Berloco/index.md
@@ -35,7 +35,7 @@ featured: true
 links:
 - name: ""
 url: "http://books.fupress.com/catalogue/cladag-2021-book-of-abstracts-and-short-papers/7254"
-url_pdf: "https://media.fupress.com/files/pdf/24/7254/19407"
+url_pdf: "http://media.fupress.com/files/pdf/24/7254/19407"
 url_code: '#'
 url_dataset: '#'
 url_poster: '#'