diff --git a/nix/sources.json b/nix/sources.json
index 4c399599..e623d068 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "a839432a5c3d2a762d68168093349097e6affb07",
-        "sha256": "1sswsll6ia2j4ixzgqa39fwhv3vwrxshqxb544jmld4z8ylq9vx4",
+        "rev": "4a3d01fb53f52ac83194081272795aa4612c2381",
+        "sha256": "0sdirpwqk61hnq8lvz4r2j60fxpcpwc8ffmicail2n4h6zifcn9n",
         "type": "tarball",
-        "url": "https://github.com/nix-community/home-manager/archive/a839432a5c3d2a762d68168093349097e6affb07.tar.gz",
+        "url": "https://github.com/nix-community/home-manager/archive/4a3d01fb53f52ac83194081272795aa4612c2381.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "kassandra": {
@@ -52,7 +52,7 @@
     "nix-output-monitor": {
         "branch": "main",
         "repo": "git@hera.m-0.eu:nix-output-monitor",
-        "rev": "d6405dd1ab77edd573b5cc98c0b7b53c78a30101",
+        "rev": "4b03db87c24c63144fd12760e51e53fd00286390",
         "type": "git"
     },
     "nixos-19.09": {
@@ -73,10 +73,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixos-hardware",
-        "rev": "f9d8dff4e621f2d7f2b84d9e84bc6359715f971c",
-        "sha256": "1nad9i9bp6n76iypih7dkh8g63pwv5krb7a3syblphnqgs1gdchd",
+        "rev": "99e33a57149916ebede78ec13edd9ba310c10f2f",
+        "sha256": "0rfjc655yzmibvs51p3ff8rl43vyk9jg35s7p93a3rbmvq3b0dgs",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixos-hardware/archive/f9d8dff4e621f2d7f2b84d9e84bc6359715f971c.tar.gz",
+        "url": "https://github.com/nixos/nixos-hardware/archive/99e33a57149916ebede78ec13edd9ba310c10f2f.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixos-mailserver": {
@@ -103,10 +103,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6141b8932a5cf376fe18fcd368cecd9ad946cb68",
-        "sha256": "1h5g6hvnsi17y43792acy4by92fyzljs93fj46w2syhn8v74a7fj",
+        "rev": "f2537a505d45c31fe5d9c27ea9829b6f4c4e6ac5",
+        "sha256": "1z28a3gqbv62sxahlssc5a722kh46f26f5ss3arbxpv7a1272vf1",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/6141b8932a5cf376fe18fcd368cecd9ad946cb68.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/f2537a505d45c31fe5d9c27ea9829b6f4c4e6ac5.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "obelisk": {