diff --git a/docs/_static/favicon.ico b/docs/_static/favicon.ico
index 5c275d6..f30ca29 100644
Binary files a/docs/_static/favicon.ico and b/docs/_static/favicon.ico differ
diff --git a/docs/conf.py b/docs/conf.py
index 1a4082e..0ba8991 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 # SPDX-FileCopyrightText: 2023 Jose D. Montoya
 #
 # SPDX-License-Identifier: MIT
@@ -184,9 +182,6 @@
         "override": True,
     },
 ]
-python_type_aliases = {
-    "DigitalInOut": "digitalio.DigitalInOut",
-}
 
 object_description_options = [
     ("py:.*", dict(generate_synopses="first_sentence")),
diff --git a/docs/requirements.txt b/docs/requirements.txt
index ee61061..f06dd1d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,5 +2,5 @@
 #
 # SPDX-License-Identifier: Unlicense
 
-sphinx-immaterial
+sphinx-immaterial>=0.11.7
 mock
diff --git a/micropython_bmp581/bmp581.py b/micropython_bmp581/bmp581.py
index 05dc6ed..6b8fbe9 100644
--- a/micropython_bmp581/bmp581.py
+++ b/micropython_bmp581/bmp581.py
@@ -267,10 +267,12 @@ def altitude(self) -> float:
         With the measured pressure p and the pressure at sea level p0 e.g. 1013.25hPa,
         the altitude in meters can be calculated with the international barometric formula
         """
+        # was ** 0.190284, should be ** 0.190295 or better ** (1.0 / 5.255))
         altitude = 44330.0 * (
-            1.0 - ((self.pressure / self.sea_level_pressure) ** 0.190284)
+            1.0 - ((self.pressure / self.sea_level_pressure) ** (1.0 / 5.255))
         )
-        return round(altitude, 1)
+        # was round(altitude, 1), rounding limits accuracy to 100cm, sensor +/- cm
+        return altitude
 
     @altitude.setter
     def altitude(self, value: float) -> None: