diff --git a/src/app.py b/src/app.py
index bac78ba..79115d3 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1,7 +1,8 @@
+from datetime import timedelta
 from glob import glob
 from os import mkdir, urandom
 
-from flask import Flask
+from flask import Flask, session
 from utils.config import Config
 
 app = Flask(__name__, static_url_path="/")
@@ -14,6 +15,13 @@ for file in glob("*/routes/*.py"):
 
 app.secret_key = urandom(12)
 
+
+@app.before_request
+def make_session_permanent():
+    session.permanent = True
+    app.permanent_session_lifetime = timedelta(days=Config.session_lifetime)
+
+
 # create data directory where posts are stored
 try:
     mkdir(Config.data_dir)
diff --git a/src/utils/config.py b/src/utils/config.py
index abac5f8..7c2ca40 100644
--- a/src/utils/config.py
+++ b/src/utils/config.py
@@ -5,6 +5,7 @@ from flask import session
 VAR_USERNAME = "TD_USERNAME"
 VAR_USERPASS = "TD_USERPASS"
 VAR_PRIVATE = "TD_PRIVATE"
+VAR_LOGLIFETIME = "TD_LOGINLIFETIME"
 
 
 class User:
@@ -41,6 +42,11 @@ class Config:
     # turn posts private
     private = True if VAR_PRIVATE in envar else False
 
+    # session duration in days
+    session_lifetime = (
+        float(envar[VAR_LOGLIFETIME]) if VAR_LOGLIFETIME in envar else 7.0
+    )
+
     @staticmethod
     def is_logged() -> bool:
         """where the info about connection is stored"""