diff --git a/apt/preferences.d/limit-unstable b/apt/preferences.d/limit-unstable
new file mode 100644
index 00000000..3350f2c1
--- /dev/null
+++ b/apt/preferences.d/limit-unstable
@@ -0,0 +1,3 @@
+Package: *
+Pin: release a=unstable
+Pin-Priority: 90
diff --git a/apt/sources.list.d/unstable.list b/apt/sources.list.d/unstable.list
new file mode 100644
index 00000000..3a2d5c59
--- /dev/null
+++ b/apt/sources.list.d/unstable.list
@@ -0,0 +1 @@
+deb http://deb.debian.org/debian/ unstable main
diff --git a/apt/trusted.gpg b/apt/trusted.gpg
index c0d6e73b..f0ed16e9 100644
Binary files a/apt/trusted.gpg and b/apt/trusted.gpg differ
diff --git a/debian_version b/debian_version
index ae425d69..e2498ea5 100644
--- a/debian_version
+++ b/debian_version
@@ -1 +1 @@
-10.1
+10.2