diff --git a/flake.lock b/flake.lock
index b01ba2a41..4f321cd7b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "mozilla-overlay": {
       "flake": false,
       "locked": {
-        "lastModified": 1636569584,
-        "narHash": "sha256-iDFogua24bhFJZSxG/jhZbbNxDXuKP9S/pyRIYzrRPM=",
+        "lastModified": 1637337116,
+        "narHash": "sha256-LKqAcdL+woWeYajs02bDQ7q8rsqgXuzhC354NoRaV80=",
         "owner": "mozilla",
         "repo": "nixpkgs-mozilla",
-        "rev": "9f70f86d73fa97e043bebeb58e5676d157069cfb",
+        "rev": "cbc7435f5b0b3d17b16fb1d20cf7b616eec5e093",
         "type": "github"
       },
       "original": {
@@ -18,16 +18,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1636552551,
-        "narHash": "sha256-k7Hq/bvUnRlAfFjPGuw3FsSqqspQdRHsCHpgadw6UkQ=",
+        "lastModified": 1637636156,
+        "narHash": "sha256-E2ym4Vcpqu9JYoQDXJZR48gVD+LPPbaCoYveIk7Xu3Y=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9e86f5f7a19db6da2445f07bafa6694b556f9c6d",
+        "rev": "b026e1cf87a108dd06fe521f224fdc72fd0b013d",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-21.05",
+        "ref": "release-21.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 4630d3ec8..867166534 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "A leading-edge control system for quantum information experiments";
 
-  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-21.05;
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/release-21.11;
   inputs.mozilla-overlay = { url = github:mozilla/nixpkgs-mozilla; flake = false; };
   inputs.src-sipyco = { url = github:m-labs/sipyco; flake = false; };
   inputs.src-pythonparser = { url = github:m-labs/pythonparser; flake = false; };