diff --git a/requirements.txt b/requirements.txt
index cc92861..e6b96f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,6 @@
 #
 # SPDX-License-Identifier: MIT
 
-Adafruit-Blinka
+Adafruit-Blinka>=6.20.4
 adafruit-circuitpython-busdevice
 adafruit-circuitpython-register
diff --git a/setup.py b/setup.py
index 4da0ddd..a99921b 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
     author="Adafruit Industries",
     author_email="circuitpython@adafruit.com",
     install_requires=[
-        "Adafruit-Blinka",
+        "Adafruit-Blinka>=6.20.4",
         "adafruit-circuitpython-busdevice",
         "adafruit-circuitpython-register",
     ],