diff --git a/express/routes.js b/express/routes.js
index 309cc489..3c0cbbd3 100644
--- a/express/routes.js
+++ b/express/routes.js
@@ -143,6 +143,7 @@ function setupRoutes(ext) {
             }
 
             req.fdkSession.access_token = token.access_token;
+            req.fdkSession.expires_in = token.expires_in;
             req.fdkSession.current_user = token.current_user;
             req.fdkSession.refresh_token = token.refresh_token;
             await SessionStorage.saveSession(req.fdkSession);
diff --git a/express/session/session.js b/express/session/session.js
index ed13a366..9080004a 100644
--- a/express/session/session.js
+++ b/express/session/session.js
@@ -10,6 +10,7 @@ class Session {
         this.state = null;
         this.scope = null;
         this.expires = null;
+        this.expires_in = null;
         this.access_mode = 'online';
         this.access_token = null;
         this.current_user = null;
@@ -33,7 +34,8 @@ class Session {
             access_token: this.access_token,
             current_user: this.current_user,
             refresh_token: this.refresh_token,
-            cluster: this.cluster
+            cluster: this.cluster,
+            expires_in: this.expires_in
         };
     }