diff --git a/.env.example b/.env.example
index 7a08ee7..63f515a 100644
--- a/.env.example
+++ b/.env.example
@@ -13,6 +13,6 @@ DDNS_RATE_LIMIT_PER_MINUTE=60
 DDNS_ADMIN_RATE_LIMIT_PER_MINUTE=20
 DDNS_MAX_REQUEST_BODY_BYTES=16384
 DDNS_CLEANUP_CHALLENGE_HOURS=72
-DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS=168
+DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS=1080
 DDNS_CLEANUP_INTERVAL_SECONDS=3600
 DDNS_TRUSTED_PROXY_IPS=127.0.0.1,::1
diff --git a/README.md b/README.md
index 32ede24..2090b76 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ export DDNS_RATE_LIMIT_PER_MINUTE=60
 export DDNS_ADMIN_RATE_LIMIT_PER_MINUTE=20
 export DDNS_MAX_REQUEST_BODY_BYTES=16384
 export DDNS_CLEANUP_CHALLENGE_HOURS=72
-export DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS=168
+export DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS=1080
 export DDNS_CLEANUP_INTERVAL_SECONDS=3600
 ```
 
@@ -228,7 +228,7 @@ Security and cleanup defaults:
 | `DDNS_MAX_REQUEST_BODY_BYTES` | `16384` | Maximum accepted request body for form/API endpoints. |
 | `DDNS_TRUSTED_HOSTS` | from `DDNS_PUBLIC_BASE_URL` | Host header allowlist. Add every public hostname that should serve the app. |
 | `DDNS_CLEANUP_CHALLENGE_HOURS` | `72` | Delete unverified DNS TXT claims after this many hours. |
-| `DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS` | `168` | Delete generated hostnames that never received a router update after this many hours. |
+| `DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS` | `1080` | Delete generated hostnames that never received a router update after this many hours. |
 | `DDNS_CLEANUP_INTERVAL_SECONDS` | `3600` | Run the in-app cleanup scheduler at this interval. |
 
 SQLite backup example:
diff --git a/router_dyndns/ddns_models.py b/router_dyndns/ddns_models.py
index 9b1522e..4bb39c0 100644
--- a/router_dyndns/ddns_models.py
+++ b/router_dyndns/ddns_models.py
@@ -31,7 +31,7 @@ class DdnsSettings(BaseModel):
     cloudflare_api_token: str = Field(default="")
     cloudflare_zone_id: str = Field(default="")
     cleanup_challenge_hours: int = Field(default=72, ge=1, le=24 * 365)
-    cleanup_unused_account_hours: int = Field(default=168, ge=1, le=24 * 365)
+    cleanup_unused_account_hours: int = Field(default=1080, ge=1, le=24 * 365)
     cleanup_interval_seconds: int = Field(default=3600, ge=1, le=24 * 60 * 60)
     ttl: int = Field(default=60, ge=60, le=86400)
 
@@ -100,7 +100,7 @@ class DdnsSettings(BaseModel):
             cloudflare_api_token=os.getenv("DDNS_CLOUDFLARE_API_TOKEN", ""),
             cloudflare_zone_id=os.getenv("DDNS_CLOUDFLARE_ZONE_ID", ""),
             cleanup_challenge_hours=_env_int("DDNS_CLEANUP_CHALLENGE_HOURS", 72),
-            cleanup_unused_account_hours=_env_int("DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS", 168),
+            cleanup_unused_account_hours=_env_int("DDNS_CLEANUP_UNUSED_ACCOUNT_HOURS", 1080),
             cleanup_interval_seconds=_env_int("DDNS_CLEANUP_INTERVAL_SECONDS", 3600),
             ttl=_env_int("DDNS_TTL", 60),
         )