diff --git a/adafruit_led_animation/group.py b/adafruit_led_animation/group.py
index afe716d..ba1111f 100644
--- a/adafruit_led_animation/group.py
+++ b/adafruit_led_animation/group.py
@@ -44,7 +44,7 @@ class AnimationGroup:
 
     Example:
 
-        .. code-block::
+        .. code-block:: python
 
             import board
             import neopixel
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..12c1b5b
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+sphinx>4