diff --git a/apt/sources.list b/apt/sources.list
index 18fbfaf5..7dd954bf 100644
--- a/apt/sources.list
+++ b/apt/sources.list
@@ -1,3 +1,3 @@
-deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
+deb http://raspbian.raspberrypi.org/raspbian/ testing main contrib non-free rpi
 # Uncomment line below then 'apt-get update' to enable 'apt-get source'
 #deb-src http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi
diff --git a/apt/sources.list.d/raspi.list b/apt/sources.list.d/raspi.list
index 5f7e8ab3..036cd469 100644
--- a/apt/sources.list.d/raspi.list
+++ b/apt/sources.list.d/raspi.list
@@ -1,3 +1,3 @@
-deb http://archive.raspberrypi.org/debian/ buster main ui
+deb http://archive.raspberrypi.org/debian/ bullseye main ui
 # Uncomment line below then 'apt-get update' to enable 'apt-get source'
 #deb-src http://archive.raspberrypi.org/debian/ stretch main ui