diff --git a/requirements.txt b/requirements.txt
index 17a850d..21aa4a0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@
 #
 # SPDX-License-Identifier: Unlicense
 
-Adafruit-Blinka
+Adafruit-Blinka>=6.20.4
+adafruit-circuitpython-typing
diff --git a/setup.py b/setup.py
index 231820c..0de4fe7 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@
     # Author details
     author="Adafruit Industries",
     author_email="circuitpython@adafruit.com",
-    install_requires=["Adafruit-Blinka"],
+    install_requires=["Adafruit-Blinka>=6.20.4", "adafruit-circuitpython-typing"],
     # Choose your license
     license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers