diff --git a/homeassistant/components/synology_dsm/__init__.py b/homeassistant/components/synology_dsm/__init__.py
index d42dacca638..4e10fb2e274 100644
--- a/homeassistant/components/synology_dsm/__init__.py
+++ b/homeassistant/components/synology_dsm/__init__.py
@@ -10,7 +10,7 @@ from synology_dsm.api.surveillance_station.camera import SynoCamera
 from synology_dsm.exceptions import SynologyDSMNotLoggedInException
 
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CONF_MAC, CONF_VERIFY_SSL
+from homeassistant.const import CONF_MAC, CONF_TIMEOUT, CONF_VERIFY_SSL
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import config_validation as cv, device_registry as dr
@@ -63,6 +63,10 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         hass.config_entries.async_update_entry(
             entry, data={**entry.data, CONF_VERIFY_SSL: DEFAULT_VERIFY_SSL}
         )
+    if entry.options.get(CONF_TIMEOUT):
+        options = dict(entry.options)
+        options.pop(CONF_TIMEOUT)
+        hass.config_entries.async_update_entry(entry, data=entry.data, options=options)
 
     # Continue setup
     api = SynoApi(hass, entry)
diff --git a/homeassistant/components/synology_dsm/common.py b/homeassistant/components/synology_dsm/common.py
index 91c4cfc4ae2..98a57319f93 100644
--- a/homeassistant/components/synology_dsm/common.py
+++ b/homeassistant/components/synology_dsm/common.py
@@ -29,7 +29,6 @@ from homeassistant.const import (
     CONF_PASSWORD,
     CONF_PORT,
     CONF_SSL,
-    CONF_TIMEOUT,
     CONF_USERNAME,
     CONF_VERIFY_SSL,
 )
@@ -119,7 +118,7 @@ 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 DEFAULT_TIMEOUT,
+            timeout=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 d6c0c6fe3e8..63ff804951c 100644
--- a/homeassistant/components/synology_dsm/config_flow.py
+++ b/homeassistant/components/synology_dsm/config_flow.py
@@ -34,7 +34,6 @@ from homeassistant.const import (
     CONF_PORT,
     CONF_SCAN_INTERVAL,
     CONF_SSL,
-    CONF_TIMEOUT,
     CONF_USERNAME,
     CONF_VERIFY_SSL,
 )
@@ -394,12 +393,6 @@ class SynologyDSMOptionsFlowHandler(OptionsFlow):
                         CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL
                     ),
                 ): cv.positive_int,
-                vol.Required(
-                    CONF_TIMEOUT,
-                    default=self.config_entry.options.get(
-                        CONF_TIMEOUT, DEFAULT_TIMEOUT
-                    ),
-                ): cv.positive_int,
                 vol.Required(
                     CONF_SNAPSHOT_QUALITY,
                     default=self.config_entry.options.get(
diff --git a/tests/components/synology_dsm/test_config_flow.py b/tests/components/synology_dsm/test_config_flow.py
index 85814f84aad..1574526a701 100644
--- a/tests/components/synology_dsm/test_config_flow.py
+++ b/tests/components/synology_dsm/test_config_flow.py
@@ -19,7 +19,6 @@ from homeassistant.components.synology_dsm.const import (
     CONF_SNAPSHOT_QUALITY,
     DEFAULT_SCAN_INTERVAL,
     DEFAULT_SNAPSHOT_QUALITY,
-    DEFAULT_TIMEOUT,
     DOMAIN,
 )
 from homeassistant.config_entries import (
@@ -35,7 +34,6 @@ from homeassistant.const import (
     CONF_PORT,
     CONF_SCAN_INTERVAL,
     CONF_SSL,
-    CONF_TIMEOUT,
     CONF_USERNAME,
     CONF_VERIFY_SSL,
 )
@@ -608,18 +606,16 @@ async def test_options_flow(hass: HomeAssistant, service: MagicMock) -> None:
     )
     assert result["type"] is FlowResultType.CREATE_ENTRY
     assert config_entry.options[CONF_SCAN_INTERVAL] == DEFAULT_SCAN_INTERVAL
-    assert config_entry.options[CONF_TIMEOUT] == DEFAULT_TIMEOUT
     assert config_entry.options[CONF_SNAPSHOT_QUALITY] == DEFAULT_SNAPSHOT_QUALITY
 
     # Manual
     result = await hass.config_entries.options.async_init(config_entry.entry_id)
     result = await hass.config_entries.options.async_configure(
         result["flow_id"],
-        user_input={CONF_SCAN_INTERVAL: 2, CONF_TIMEOUT: 30, CONF_SNAPSHOT_QUALITY: 0},
+        user_input={CONF_SCAN_INTERVAL: 2, CONF_SNAPSHOT_QUALITY: 0},
     )
     assert result["type"] is FlowResultType.CREATE_ENTRY
     assert config_entry.options[CONF_SCAN_INTERVAL] == 2
-    assert config_entry.options[CONF_TIMEOUT] == 30
     assert config_entry.options[CONF_SNAPSHOT_QUALITY] == 0