diff --git a/README.md b/README.md
index 5fc2c8b..408aa38 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,10 @@ apt-get install aspell-am aspell-ar aspell-ar-large aspell-bg aspell-bn aspell-b
 
 Copy (and modify according to your needs) the configuration files in etc to /etc after installation has finished.
 
+If you copied over the new etc/apt/sources.list file, we need to update our repository data and install a new keyring package for authenticating packages from torproject:
+```
+apt-get update && apt-get install deb.torproject.org-keyring
+```
 
 To allow sasl authentication, add postfix to the sasl group:
 ```
diff --git a/etc/apt/sources.list b/etc/apt/sources.list
new file mode 100644
index 0000000..e1f697e
--- /dev/null
+++ b/etc/apt/sources.list
@@ -0,0 +1,2 @@
+deb tor+http://vwakviie2ienjx6t.onion/debian unstable main
+deb tor+http://sdscoq7snqtznauu.onion/torproject.org sid main