diff --git a/homeassistant/components/synology_dsm/common.py b/homeassistant/components/synology_dsm/common.py
index c871dd7b705..91c4cfc4ae2 100644
--- a/homeassistant/components/synology_dsm/common.py
+++ b/homeassistant/components/synology_dsm/common.py
@@ -39,6 +39,7 @@ from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .const import (
     CONF_DEVICE_TOKEN,
+    DEFAULT_TIMEOUT,
     EXCEPTION_DETAILS,
     EXCEPTION_UNKNOWN,
     SYNOLOGY_CONNECTION_EXCEPTIONS,
@@ -118,7 +119,7 @@ class SynoApi:
             self._entry.data[CONF_USERNAME],
             self._entry.data[CONF_PASSWORD],
             self._entry.data[CONF_SSL],
-            timeout=self._entry.options.get(CONF_TIMEOUT) or 10,
+            timeout=self._entry.options.get(CONF_TIMEOUT) or DEFAULT_TIMEOUT,
             device_token=self._entry.data.get(CONF_DEVICE_TOKEN),
         )
         await self.async_login()
diff --git a/homeassistant/components/synology_dsm/config_flow.py b/homeassistant/components/synology_dsm/config_flow.py
index 785baa50b29..d6c0c6fe3e8 100644
--- a/homeassistant/components/synology_dsm/config_flow.py
+++ b/homeassistant/components/synology_dsm/config_flow.py
@@ -179,7 +179,9 @@ class SynologyDSMFlowHandler(ConfigFlow, domain=DOMAIN):
                 port = DEFAULT_PORT
 
         session = async_get_clientsession(self.hass, verify_ssl)
-        api = SynologyDSM(session, host, port, username, password, use_ssl, timeout=30)
+        api = SynologyDSM(
+            session, host, port, username, password, use_ssl, timeout=DEFAULT_TIMEOUT
+        )
 
         errors = {}
         try:
diff --git a/homeassistant/components/synology_dsm/const.py b/homeassistant/components/synology_dsm/const.py
index 140e07e975b..35d3008b416 100644
--- a/homeassistant/components/synology_dsm/const.py
+++ b/homeassistant/components/synology_dsm/const.py
@@ -40,7 +40,7 @@ DEFAULT_PORT = 5000
 DEFAULT_PORT_SSL = 5001
 # Options
 DEFAULT_SCAN_INTERVAL = 15  # min
-DEFAULT_TIMEOUT = 10  # sec
+DEFAULT_TIMEOUT = 30  # sec
 DEFAULT_SNAPSHOT_QUALITY = SNAPSHOT_PROFILE_BALANCED
 
 ENTITY_UNIT_LOAD = "load"