diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3490646b4..473a4c35a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,18 +1,20 @@
 # Changelog
 
-## V0.37.4
+## v0.37.5
 
-- Combine set_temperature_offset() with set_number()
-- Fix typo in manual_fixtures.py script
+- Add setting the thermostat temperature_offset to the set_number() function.
+- Fix typo in manual_fixtures.py script.
+
+## v0.37.4 - not released
 
 ## v0.37.3
 
-- Fix for [plugwise-beta #620](https://github.com/plugwise/plugwise-beta/issues/620)
+- Fix for [plugwise-beta #620](https://github.com/plugwise/plugwise-beta/issues/620).
 
 ## v0.37.2
 
-- Code improvements
-- Remove unused dependencies from pyproject.toml
+- Code improvements.
+- Remove unused dependencies from pyproject.toml.
 
 ## V0.37.1
 
diff --git a/plugwise/__init__.py b/plugwise/__init__.py
index cc886c27d..d9e575cc8 100644
--- a/plugwise/__init__.py
+++ b/plugwise/__init__.py
@@ -325,12 +325,12 @@ async def set_temperature(self, loc_id: str, items: dict[str, float]) -> None:
 
     async def set_number(
         self,
+        dev_id: str,
         key: str,
         temperature: float,
-        dev_id: str | None = None,
     ) -> None:
         """Set the max. Boiler or DHW setpoint on the Central Heating boiler."""
-        await self._smile_api.set_number(key, temperature, dev_id)
+        await self._smile_api.set_number(dev_id, key, temperature)
 
     async def set_switch_state(
         self, appl_id: str, members: list[str] | None, model: str, state: str
diff --git a/plugwise/legacy/smile.py b/plugwise/legacy/smile.py
index d3277ed04..24761a9da 100644
--- a/plugwise/legacy/smile.py
+++ b/plugwise/legacy/smile.py
@@ -156,9 +156,9 @@ async def set_gateway_mode(self, mode: str) -> None:
 
     async def set_number(
         self,
+        dev_id: str,
         key: str,
         temperature: float,
-        dev_id: str | None,
     ) -> None:
         """Set-function placeholder for legacy devices."""
 
diff --git a/plugwise/smile.py b/plugwise/smile.py
index 6437ba47e..555c8679d 100644
--- a/plugwise/smile.py
+++ b/plugwise/smile.py
@@ -184,12 +184,12 @@ async def set_gateway_mode(self, mode: str) -> None:
 
     async def set_number(
         self,
+        dev_id: str,
         key: str,
         temperature: float,
-        dev_id: str | None,
     ) -> None:
         """Set the maximum boiler- or DHW-setpoint on the Central Heating boiler or the temperature-offset on a Thermostat."""
-        if dev_id is not None:
+        if key == "temperature_offset":
             await self.set_offset(dev_id, temperature)
             return
 
diff --git a/pyproject.toml b/pyproject.toml
index b852a120d..bd79dde10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name            = "plugwise"
-version         = "0.37.4"
+version         = "0.37.5"
 license         = {file = "LICENSE"}
 description     = "Plugwise Smile (Adam/Anna/P1) and Stretch module for Python 3."
 readme          = "README.md"
diff --git a/tests/test_init.py b/tests/test_init.py
index 94e489248..c489e7502 100644
--- a/tests/test_init.py
+++ b/tests/test_init.py
@@ -876,7 +876,7 @@ async def tinker_max_boiler_temp(smile):
         _LOGGER.info("- Adjusting temperature to %s", new_temp)
         for test in ["maximum_boiler_temperature", "bogus_temperature"]:
             try:
-                await smile.set_number(test, new_temp)
+                await smile.set_number("dummy", test, new_temp)
                 _LOGGER.info("  + tinker_max_boiler_temp worked as intended")
             except pw_exceptions.PlugwiseError:
                 _LOGGER.info("  + tinker_max_boiler_temp failed as intended")
@@ -887,7 +887,7 @@ async def tinker_temp_offset(smile, dev_id):
         new_offset = 1.0
         _LOGGER.info("- Adjusting temperature offset to %s", new_offset)
         try:
-            await smile.set_number("dummy", new_offset, dev_id=dev_id)
+            await smile.set_number(dev_id, "temperature_offset", new_offset)
             _LOGGER.info("  + tinker_temp_offset worked as intended")
             return True
         except pw_exceptions.PlugwiseError: