diff --git a/api/src/dooris_api/keycloak.py b/api/src/dooris_api/keycloak.py
index de99b92..79108fb 100644
--- a/api/src/dooris_api/keycloak.py
+++ b/api/src/dooris_api/keycloak.py
@@ -11,6 +11,9 @@ from simple_openid_connect.data import TokenErrorResponse
 logger = logging.getLogger(__name__)
 
 
+CRON_INTERVAL_MIN = 13.37
+
+
 class ClientCredentialsAuth:
     def __init__(self, oidc_client: OpenidClient):
         self.oidc_client = oidc_client
@@ -65,7 +68,7 @@ class KeycloakClient:
             except Exception as e:
                 logger.exception(f"Error in Keycloak cron task: {e}")
             finally:
-                await asyncio.sleep(15 * 60)  # 15 minutes
+                await asyncio.sleep(CRON_INTERVAL_MIN * 60)
 
     async def fetch_ssh_keys(self):
         logger.info("Fetching ssh keys from keycloak")
@@ -80,7 +83,7 @@ class KeycloakClient:
     async def write_authorized_keys(self):
         logger.info(f"Writing authorized keys to {self.authorized_keys_file.absolute()}")
         with self.authorized_keys_file.open(mode="wt", encoding="UTF-8") as f:
-            f.writelines(self.ssh_keys)
+            f.writelines([f"{i}\n" for i in self.ssh_keys])
 
         self.authorized_keys_file.chmod(stat.S_IWUSR | stat.S_IRUSR)