diff --git a/flake.lock b/flake.lock
index 9090749f..9b5ac54d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,11 +16,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1630522866,
-        "narHash": "sha256-NHb4vgG11Eyk1lB3QGqS2xtjKqndsZzrJRbuysr3QSM=",
+        "lastModified": 1630964657,
+        "narHash": "sha256-owGDhoOhY9AXsqkPvGJrprxfH3VEEiRmmzZiHy2bibM=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "71be98642c44b9f082f2d7fc5665ff6091ae2ed2",
+        "rev": "e421291bdd94c79d6ae98f05ed8f09412d0b6ad7",
         "type": "github"
       },
       "original": {
@@ -30,6 +30,37 @@
         "type": "github"
       }
     },
+    "nixpkgs-master": {
+      "locked": {
+        "lastModified": 1629897889,
+        "narHash": "sha256-YoY/umk+NUtLFJgvTJkup6nLJb+sGEZ21hrupKTp7EI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6248814b6892af7dc0cf973b49690fd102088e02",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1629901205,
+        "narHash": "sha256-Gg1tM3ZO1sSk8ffYt6pawmJ/2s3ER0x0EqRQq5Emk2o=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e24074676be27d6ec8fe04ea97d7e916809a3016",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-21.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "nixos-hardware": "nixos-hardware",
@@ -37,17 +68,18 @@
         "scrapers": "scrapers",
         "secrets": "secrets",
         "tigger": "tigger",
-        "yammat": "yammat"
+        "yammat": "yammat",
+        "zentralwerk": "zentralwerk"
       }
     },
     "scrapers": {
       "flake": false,
       "locked": {
-        "lastModified": 1626569808,
-        "narHash": "sha256-6ZRESzqxNTIlJ8vxasovdHi2udp6Ap/f2nfKYDvN/U4=",
+        "lastModified": 1630884552,
+        "narHash": "sha256-aqphDNb2dg+MX38WlcKGN+E8bm8bgUse/T9tMiH4IPc=",
         "ref": "master",
-        "rev": "16962f087f7954f712fe02d53fcd42bcaa2bea1c",
-        "revCount": 31,
+        "rev": "a625635ee1e65b19fbc41d603c1c66d5caebc7e8",
+        "revCount": 32,
         "type": "git",
         "url": "https://gitea.c3d2.de/astro/scrapers.git"
       },
@@ -107,6 +139,43 @@
         "type": "git",
         "url": "https://gitea.c3d2.de/astro/yammat.git"
       }
+    },
+    "zentralwerk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2",
+        "nixpkgs-master": "nixpkgs-master",
+        "zentralwerk-network-key": "zentralwerk-network-key"
+      },
+      "locked": {
+        "lastModified": 1630966288,
+        "narHash": "sha256-PbCOvTH+Whi6byuxo1d7A3IxYdXjqDuwjVsE4KNvOSA=",
+        "ref": "master",
+        "rev": "04de05ce751532e6f671be2b36988e54cbed25e4",
+        "revCount": 1166,
+        "type": "git",
+        "url": "https://gitea.c3d2.de/zentralwerk/network.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://gitea.c3d2.de/zentralwerk/network.git"
+      }
+    },
+    "zentralwerk-network-key": {
+      "locked": {
+        "dir": "nix/key",
+        "lastModified": 1628810339,
+        "narHash": "sha256-pwEMoeoMGELBXRPaey3AlQSgEBeUarpeMcy/lcNg1Hs=",
+        "ref": "master",
+        "rev": "c2b1a2f18332feb3acc088f79e21f5f41d432953",
+        "revCount": 1137,
+        "type": "git",
+        "url": "https://gitea.c3d2.de/zentralwerk/network.git?dir=nix%2fkey"
+      },
+      "original": {
+        "dir": "nix/key",
+        "type": "git",
+        "url": "https://gitea.c3d2.de/zentralwerk/network.git?dir=nix%2fkey"
+      }
     }
   },
   "root": "root",