diff --git a/content/_index.fr.md b/content/_index.fr.md
index cab9bfc..2cbb76f 100644
--- a/content/_index.fr.md
+++ b/content/_index.fr.md
@@ -108,7 +108,7 @@ situé sur un emplacement privilégié,
 
 ### Quelques photos du **DevFest Toulouse 2018** avec le thème 👾 _retro-gaming_. 
 
-<a class="btn inverse icon-right" target="_blank" rel="noopener" href="https://photos.app.goo.gl/nJYFVReFUk9mnXbv9">
+<a class="btn primary icon-right" target="_blank" rel="noopener" href="https://photos.app.goo.gl/nJYFVReFUk9mnXbv9">
     Voir toutes les photos
 </a>
 
diff --git a/content/_index.md b/content/_index.md
index f697be0..1142a79 100644
--- a/content/_index.md
+++ b/content/_index.md
@@ -115,7 +115,7 @@ in the immediate vicinity of the centre of Toulouse and in a green environment.
 
 ### Some pictures of the **DevFest Toulouse 2018** with the 👾 _retro-gaming_ theme.
 
-<a class="btn inverse icon-right" target="_blank" rel="noopener" href="https://photos.app.goo.gl/nJYFVReFUk9mnXbv9">
+<a class="btn primary icon-right" target="_blank" rel="noopener" href="https://photos.app.goo.gl/nJYFVReFUk9mnXbv9">
     See all photos
 </a>