diff --git a/canaille/oidc/oauth.py b/canaille/oidc/oauth.py
index 5879f74c..a162dc56 100644
--- a/canaille/oidc/oauth.py
+++ b/canaille/oidc/oauth.py
@@ -151,7 +151,7 @@ def save_authorization_code(code, request):
         scope=scope,
         nonce=nonce,
         issue_date=now,
-        lifetime=str(AUTHORIZATION_CODE_LIFETIME),
+        lifetime=AUTHORIZATION_CODE_LIFETIME,
         challenge=request.data.get("code_challenge"),
         challenge_method=request.data.get("code_challenge_method"),
     )
diff --git a/tests/oidc/conftest.py b/tests/oidc/conftest.py
index 1e801546..15e33ff0 100644
--- a/tests/oidc/conftest.py
+++ b/tests/oidc/conftest.py
@@ -153,7 +153,7 @@ def authorization(testclient, user, client, slapd_connection):
         scope="openid profile",
         nonce="nonce",
         issue_date=datetime.datetime(2020, 1, 1, tzinfo=datetime.timezone.utc),
-        lifetime="3600",
+        lifetime=3600,
         challenge="challenge",
         challenge_method="method",
         revokation="",
@@ -175,7 +175,7 @@ def token(testclient, client, user, slapd_connection):
         refresh_token=gen_salt(48),
         scope="openid profile",
         issue_date=datetime.datetime.now(datetime.timezone.utc),
-        lifetime=str(3600),
+        lifetime=3600,
     )
     t.save()
     yield t