diff --git a/d1/dynu_update.py b/d1/dynu_update.py
index a2e1ffc..1f8536c 100644
--- a/d1/dynu_update.py
+++ b/d1/dynu_update.py
@@ -1,3 +1,7 @@
+import multiprocessing
+import time
+import traceback
+import datetime
 import requests
 import logging
 import pprint
@@ -6,82 +10,121 @@ import io
 import json
 import sys
 
-logging.warning('start dynu_update')
-with io.open(
-    sys.argv[1],
-    'r'
-) as f:
-    dynu_config = json.load(f)
-logging.warning('loaded dynu_config')
-if dynu_config.get('enabled') != True:
-    logging.warning('disabled')
-    sys.exit(0)
 
-t2 = requests.get(
-    'https://api.dynu.com/v2/oauth2/token',
-    auth=(
-        dynu_config['oath2_client_id'],
-        dynu_config['oath2_secret'],
-    )
-).json()
-logging.warning('got access_token')
-
-t1 = requests.get(
-    'https://api.dynu.com/v2/dns',
-    headers={
-        'Authorization': 'Bearer %s' % t2['access_token']
-    }
-).json()
-DYNU_DOMAIN = t1['domains'][0]
-logging.warning('got dynu_domain')
-
-t3 = requests.get(
-    'https://api.dynu.com/v2/dns/%d/webredirect' % DYNU_DOMAIN['id'],
-    headers={
-        'Authorization': 'Bearer %s' % t2['access_token']
-    }
-).json()
-DYNU_REDIRECT = t3['webRedirects'][0]
-logging.warning('got dynu_redirect')
-
-NGROK_DOMAIN = sys.argv[2]
-t6 = requests.get('http://%s:4040/api/tunnels' % NGROK_DOMAIN).json()
-TUNNEL_URL = t6['tunnels'][0]['public_url'].replace('http://', 'https://')
-logging.warning('got tunnel_url')
-
-
-
-if TUNNEL_URL != DYNU_REDIRECT['url']:
-    t5 = copy.deepcopy(t3['webRedirects'][0])
-    t5.update(
-        dict(
-            url=TUNNEL_URL,
+def update(
+    dynu_config,
+):
+    t2 = requests.get(
+        'https://api.dynu.com/v2/oauth2/token',
+        auth=(
+            dynu_config['oath2_client_id'],
+            dynu_config['oath2_secret'],
         )
-    )
+    ).json()
+    logging.warning('got access_token')
 
-    DYNU_REDIRECT = requests.post(
-        'https://api.dynu.com/v2/dns/%d/webRedirect/%d' % (
-            DYNU_DOMAIN['id'],
-            t3['webRedirects'][0]['id']
-        ),
+    t1 = requests.get(
+        'https://api.dynu.com/v2/dns',
         headers={
             'Authorization': 'Bearer %s' % t2['access_token']
-        },
-        json=t5
+        }
     ).json()
-    logging.warning('updated dynu_redirect')
-else:
-    logging.warning('skip update dynu_redirect')
+    DYNU_DOMAIN = t1['domains'][0]
+    logging.warning('got dynu_domain')
 
-logging.warning(
-    pprint.pformat(
-        dict(
-            NGROK_DOMAIN=NGROK_DOMAIN,
-            TUNNEL_URL=TUNNEL_URL,
-            DYNU_DOMAIN=DYNU_DOMAIN,
-            DYNU_REDIRECT=DYNU_REDIRECT,
+    t3 = requests.get(
+        'https://api.dynu.com/v2/dns/%d/webredirect' % DYNU_DOMAIN['id'],
+        headers={
+            'Authorization': 'Bearer %s' % t2['access_token']
+        }
+    ).json()
+    DYNU_REDIRECT = t3['webRedirects'][0]
+    logging.warning('got dynu_redirect')
+
+    NGROK_DOMAIN = sys.argv[2]
+    t6 = requests.get('http://%s:4040/api/tunnels' % NGROK_DOMAIN).json()
+    TUNNEL_URL = t6['tunnels'][0]['public_url'].replace('http://', 'https://')
+    logging.warning('got tunnel_url')
+
+
+
+    if TUNNEL_URL != DYNU_REDIRECT['url']:
+        t5 = copy.deepcopy(t3['webRedirects'][0])
+        t5.update(
+            dict(
+                url=TUNNEL_URL,
+            )
+        )
+
+        DYNU_REDIRECT = requests.post(
+            'https://api.dynu.com/v2/dns/%d/webRedirect/%d' % (
+                DYNU_DOMAIN['id'],
+                t3['webRedirects'][0]['id']
+            ),
+            headers={
+                'Authorization': 'Bearer %s' % t2['access_token']
+            },
+            json=t5
+        ).json()
+        logging.warning('updated dynu_redirect')
+    else:
+        logging.warning('skip update dynu_redirect')
+
+    logging.warning(
+        pprint.pformat(
+            dict(
+                NGROK_DOMAIN=NGROK_DOMAIN,
+                TUNNEL_URL=TUNNEL_URL,
+                DYNU_DOMAIN=DYNU_DOMAIN,
+                DYNU_REDIRECT=DYNU_REDIRECT,
+            )
         )
     )
-)
 
-logging.warning('done dynu_update')
+    logging.warning('done dynu_update')
+
+def service():
+    logging.warning('start dynu_update')
+
+    need_wait = False
+
+    while True:
+        try:
+            if need_wait:
+                need_wait = False
+                time.sleep(900)
+
+            with io.open(
+                sys.argv[1],
+                'r'
+            ) as f:
+                dynu_config = json.load(f)
+
+            if dynu_config.get('enabled') != True:
+                logging.warning('disabled')
+                continue
+            else:
+                logging.warning('loaded dynu_config')
+
+            with multiprocessing.Pool(processes=1) as pool:
+                while True:
+                    pool.apply(
+                        update,
+                        args=(
+                            dynu_config,
+                        )
+                    )
+
+                    time.sleep(900)
+        except KeyboardInterrupt:
+            break
+        except:
+            logging.error('%s\n%s' % (
+                datetime.datetime.now(tz=datetime.timezone.utc),
+                traceback.format_exc().strip()
+            ))
+            need_wait = True
+
+
+if __name__ == '__main__':
+    service()