1 files changed, 2 insertions, 1 deletions
diff --git a/server/sonar-docs/gatsby-config.js b/server/sonar-docs/gatsby-config.js
index 19d540c5c43..831aa76758d 100644
--- a/server/sonar-docs/gatsby-config.js
+++ b/server/sonar-docs/gatsby-config.js
@@ -42,7 +42,8 @@ module.exports = {
                 danger: 'alert alert-danger',
                 warning: 'alert alert-warning',
                 info: 'alert alert-info',
-                success: 'alert alert-success'
+                success: 'alert alert-success',
+                collapse: 'collapse'
               }
             }
           }