diff --git a/atst/app.py b/atst/app.py
index 305d3b6d..e1af87c8 100644
--- a/atst/app.py
+++ b/atst/app.py
@@ -86,6 +86,7 @@ def map_config(config):
         "SQLALCHEMY_DATABASE_URI": config["default"]["DATABASE_URI"],
         "SQLALCHEMY_TRACK_MODIFICATIONS": False,
         **config["default"],
+        "PERMANENT_SESSION_LIFETIME": int(config["default"]["PERMANENT_SESSION_LIFETIME"]),
     }
 
 
diff --git a/config/base.ini b/config/base.ini
index ad7afb41..2ca8f9f3 100644
--- a/config/base.ini
+++ b/config/base.ini
@@ -9,7 +9,6 @@ SECRET_KEY = change_me_into_something_secret
 CAC_URL = http://localhost:8000/login-redirect
 PE_NUMBER_CSV_URL = http://c95e1ebb198426ee57b8-174bb05a294821bedbf46b6384fe9b1f.r31.cf5.rackcdn.com/penumbers.csv
 REDIS_URI = redis://localhost:6379
-SESSION_TTL_SECONDS = 600
 PGAPPNAME = atst
 PGHOST = localhost
 PGPORT = 5432
@@ -19,5 +18,6 @@ PGDATABASE = atat
 SESSION_TYPE = redis
 SESSION_COOKIE_NAME=atat
 SESSION_USE_SIGNER = True
+PERMANENT_SESSION_LIFETIME = 600
 CRL_DIRECTORY = crl
 CA_CHAIN = ssl/server-certs/ca-chain.pem