diff --git a/doc/api/signaltypes.rst b/doc/api/signaltypes.rst
index 7fbbb00..0626589 100644
--- a/doc/api/signaltypes.rst
+++ b/doc/api/signaltypes.rst
@@ -248,9 +248,9 @@ temperature: °C
 Temperature is measured in degrees Celcius (°C). To convert to degrees
 Fahrenheit (°F) or Kelvin (K), you can use the following conversion formulas:
 
-    :math:`°\kern1pt\!F = °\kern2pt\!C \cdot \frac{9}{5} + 32`.
+    :math:`^{\circ}\kern1pt\!F =\kern1pt^{\circ}\kern1pt\!C \cdot \frac{9}{5} + 32`.
 
-    :math:`K = °\kern2pt\!C + 273.15`.
+    :math:`K =\kern1pt^{\circ}\kern1pt\!C + 273.15`.
 
 .. _hue:
 
diff --git a/setup.cfg b/setup.cfg
index 08428ad..ae6be4a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,3 +5,4 @@ max-line-length = 88
 
 [doc8]
 ignore-path = .venv/,doc/api/build/,pybricks.egg-info/
+max-line-length = 88