diff --git a/nix/os/devices/steveej-t480s-work/versions.nix b/nix/os/devices/steveej-t480s-work/versions.nix
index 24214ec..3d8fc1c 100644
--- a/nix/os/devices/steveej-t480s-work/versions.nix
+++ b/nix/os/devices/steveej-t480s-work/versions.nix
@@ -1,15 +1,20 @@
 {
   channelsNixosStable = {
     ref = "nixos-19.03";
-    rev = "23fd1394dc6bef03a2ff010278a24403a97f0647";
+    rev = "3a4ffdd38b56801ce616aa08791121d36769e884";
   };
   channelsNixosUnstable = {
     ref = "nixos-unstable";
     rev = "07b42ccf2de451342982b550657636d891c4ba35";
   };
+  nixpkgsMaster = {
+    url = "https://github.com/NixOS/nixpkgs/";
+    ref = "master";
+    rev = "d8c7f0bd3f42bc9e687b12ce7f0a4ef747f27933";
+  };
   homeManagerModule = {
     url = "https://github.com/rycee/home-manager";
     ref = "master";
-    rev = "bc2b7d4f0972412f6f0d5792560a90adc4f2d4c1";
+    rev = "03162970cd6dadfac58f169cd50aed5a5aeec14f";
   };
 }