diff --git a/_config.yml b/_config.yml
index aba5597..aa85080 100644
--- a/_config.yml
+++ b/_config.yml
@@ -11,7 +11,7 @@ style: light
 title: 'Gaspard Jankowiak · TU Wien'
 
 header-title-fr: 'Page personnelle de Gaspard Jankowiak'
-header-subtitle-fr: 'Postdoc l´Université Technique de Vienne<br><span>gaspard</span>.<span>jankowiak</span>@<span>math.cnrs.fr</span>'
+header-subtitle-fr: "Postdoc l\'Université Technique de Vienne<br><span>gaspard</span>.<span>jankowiak</span>@<span>math.cnrs.fr</span>"
 header-homelink-fr: '/'
 
 header-title-en: "Gaspard Jankowiak's homepage"