diff --git a/R/poster.Rmd b/R/poster.Rmd
index 5253df9..22c627f 100644
--- a/R/poster.Rmd
+++ b/R/poster.Rmd
@@ -78,6 +78,7 @@
         self_contained: false
         keep_md: true
 
+lang: en
 bibliography: ../tex/references.bib
 csl: "https://raw.githubusercontent.com/ICLC-10/Zotero/master/styles/ICLC-10.csl"
 ---
