diff --git a/examples/sessions.js b/examples/sessions.js
index f495eae..030c25d 100644
--- a/examples/sessions.js
+++ b/examples/sessions.js
@@ -3,6 +3,7 @@ import { lottus, form_processor, InMemorySessionManager, process_w_session, form
 (async function () {
     const bot = create_bot();
     const session_manager = new InMemorySessionManager();
+    session_manager.delete_after(1);
 
     let input = ["", "1", "0", "2"];
 
@@ -19,6 +20,15 @@ import { lottus, form_processor, InMemorySessionManager, process_w_session, form
         
         console.log(await process_request(bot, session_manager, identifier, {prompt: i}));
     }
+
+    input = ["", "1", "0", "2"];
+
+    setTimeout(function(){}, 3);
+    for(const i of input){
+        const identifier = "841234567";
+
+        console.log(await process_request(bot, session_manager, identifier, {prompt: i}));
+    }
 })();
 
 async function process_request(bot, session_manager, msisdn, request){
diff --git a/index.js b/index.js
index d7ef6e7..7d07e59 100644
--- a/index.js
+++ b/index.js
@@ -729,14 +729,38 @@ function format_message(message, parameters){
 
 class InMemorySessionManager {
     #sessions = new Map();
+    #delete_after = 1000 * 60 * 5;
+
+    /**
+     * 
+     * @param {number} ms 
+     */
+    delete_after(ms){
+        this.#delete_after = ms;
+    }
 
     /**
      * 
      * @param {string} identifier 
-     * @returns {object}
+     * @returns {object | null}
      */
     get(identifier){
-        return this.#sessions.get(identifier);
+        const session = this.#sessions.get(identifier);
+        if(!session){
+            return null
+        }
+
+        const created_at = session.created_at;
+        const now = new Date();
+        const diff_time = Math.abs(now - created_at);
+
+        if(this.#delete_after && diff_time > this.#delete_after){
+            this.close(identifier);
+
+            return null;
+        }
+
+        return session;
     }
 
     /**
@@ -746,7 +770,7 @@ class InMemorySessionManager {
      * @param {object} parameters 
      */
     save(identifier, message, parameters){
-        this.#sessions.set(identifier, {message: message, parameters: parameters});
+        this.#sessions.set(identifier, {message: message, parameters: parameters, created_at: new Date()});
     }
 
     /**