diff --git a/flake.lock b/flake.lock
index 7b5c2b1f..23594437 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1620983891,
-        "narHash": "sha256-E2OKVgGo/cUqDsrIeYGVx64b4cxgzd7+bX33NHL0rbA=",
+        "lastModified": 1622521809,
+        "narHash": "sha256-7XcqrtrHDeaasKzg/ruroLsC2fb6Fi3aenCrv1+xVLk=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "c4399b921fa7ff5f93ee10b3521b56b722ed74d8",
+        "rev": "b2186d6c3cdc58fb3a8def0f608bcae61138cc6f",
         "type": "github"
       },
       "original": {
@@ -16,16 +16,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1622041780,
-        "narHash": "sha256-5t9WVhKCNPsytFwI7IrjiTNw85R39vK7m+7XlxC28iw=",
+        "lastModified": 1622998889,
+        "narHash": "sha256-dirgYjj8j9shDVNFKQpXtWE4CCTU8ykkRPrnSOLicNs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "57665799d95feecdebefe393f6f4d9e6e48555a0",
+        "rev": "5e61b8b53710972a4b2a84755c28566c206bd861",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "release-20.09",
+        "ref": "release-21.05",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 4170841e..9ca4fd41 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "C3D2 NixOS configurations";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/release-20.09";
+    nixpkgs.url = "github:nixos/nixpkgs/release-21.05";
     secrets.url = "git+ssh://git@gitea.c3d2.de:2222/c3d2-admins/secrets.git";
     yammat.url = "git+https://gitea.c3d2.de/astro/yammat.git?ref=nix";
     yammat.inputs.nixpkgs.follows = "nixpkgs";