diff --git a/out/config.d.ts b/out/config.d.ts
index e22eaea..c9b325b 100644
--- a/out/config.d.ts
+++ b/out/config.d.ts
@@ -12,6 +12,7 @@ export declare const DefaultConfig: {
     REDIS_URL: string | undefined;
     SESSION_SECRET: string | undefined;
     USERINFO_HEADER: string;
+    EXPIRE_HEADER: string;
     AUTH_PROXY_URL: string | undefined;
 };
 export {};
diff --git a/out/config.js b/out/config.js
index 94d6137..ad0409e 100644
--- a/out/config.js
+++ b/out/config.js
@@ -21,6 +21,8 @@ const envs = {
     SESSION_SECRET: env.get('SESSION_SECRET').asString() || undefined,
     // header where user info token is stored to request auth proxy
     USERINFO_HEADER: env.get('USERINFO_HEADER').default("X-Userinfo-Token").asString(),
+    // header when user info token expires (seconds after 01/01/1970)
+    EXPIRE_HEADER: env.get('EXPIRE_HEADER').default("X-Userinfo-Expire").asString(),
     // base url to init a logout or request user info
     AUTH_PROXY_URL: env.get('AUTH_PROXY_URL').asString() || undefined,
     // override AUTH_PROXY_URL to request user info