diff --git a/hydra/artiq.json b/hydra/artiq.json
index 8b8dcc9..a0e98ee 100644
--- a/hydra/artiq.json
+++ b/hydra/artiq.json
@@ -182,7 +182,7 @@
         "emailoverride": "",
         "keepnr": 50,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-22.05", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-23.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "urukulSrc": { "type": "git", "value": "https://github.com/quartiq/urukul.git", "emailresponsible": false },
             "mirnySrc": { "type": "git", "value": "https://github.com/quartiq/mirny.git", "emailresponsible": false },
diff --git a/hydra/mcu.json b/hydra/mcu.json
index d60db85..2f4b618 100644
--- a/hydra/mcu.json
+++ b/hydra/mcu.json
@@ -5,13 +5,13 @@
         "description": "Third-party MCU firmware",
         "nixexprinput": "nixScripts",
         "nixexprpath": "mcu-contrib.nix",
-        "checkinterval": 300,
+        "checkinterval": 7200,
         "schedulingshares": 10,
         "enableemail": false,
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-22.05", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-23.05", "emailresponsible": false },
             "mozillaOverlay": { "type": "git", "value": "https://github.com/mozilla/nixpkgs-mozilla.git", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "stabilizerSrc": { "type": "git", "value": "https://github.com/quartiq/stabilizer.git", "emailresponsible": false },
diff --git a/hydra/web.json b/hydra/web.json
index bd2908a..61ea4b0 100644
--- a/hydra/web.json
+++ b/hydra/web.json
@@ -11,7 +11,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-22.05", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "https://github.com/NixOS/nixpkgs.git nixos-23.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "webSrc": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/web2019.git", "emailresponsible": false },
             "nmigenSrc": { "type": "git", "value": "https://gitlab.com/nmigen/nmigen.git", "emailresponsible": false }