diff --git a/api/app/Main.hs b/api/app/Main.hs
index ba72584..16b6628 100644
--- a/api/app/Main.hs
+++ b/api/app/Main.hs
@@ -9,7 +9,7 @@ import Hasql.Pool (acquire)
 import Hasql.Transaction (Transaction, condemn, sql, statement)
 import Rel8 (each, insert, select)
 import Servant
-import Servant.Auth.Server (CookieSettings, JWTSettings, defaultCookieSettings, defaultJWTSettings, generateKey)
+import Servant.Auth.Server (CookieSettings, JWTSettings, defaultCookieSettings, defaultJWTSettings, generateKey, readKey, writeKey)
 import Network.Wai.Middleware.Servant.Errors
 import App
 import Config (dbConfigToConnSettings, getPostgresConfig)
@@ -19,10 +19,12 @@ import Lib
 import Network.Wai
 import Network.Wai.Handler.Warp
 import System.Environment.MrEnv (envAsBool, envAsInt, envAsInteger, envAsString)
+import Control.Applicative ((<|>))
 
 main :: IO ()
 main = do
-    key <- generateKey
+    let path = "/cache/key.jwk"
+    key <- readKey path <|> (writeKey path >> readKey path)
     dbConf <- getPostgresConfig
     appPort <- envAsInt "AERIS_BACK_PORT" 8080
     let jwtCfg = defaultJWTSettings key
diff --git a/docker-compose.yml b/docker-compose.yml
index d4036c5..b8c3b90 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -32,6 +32,8 @@ services:
       - "8080:8080"
     depends_on:
       - "db"
+    volumes:
+      - cache:/cache
     environment:
       - POSTGRES_USER=${POSTGRES_USER}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
@@ -76,4 +78,5 @@ services:
 
 volumes:
   apk:
+  cache: