diff --git a/flake.lock b/flake.lock
index 2f11f15..5b13d19 100644
--- a/flake.lock
+++ b/flake.lock
@@ -39,11 +39,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1738453229,
-        "narHash": "sha256-7H9XgNiGLKN1G1CgRh0vUL4AheZSYzPm+zmZ7vxbJdo=",
+        "lastModified": 1736143030,
+        "narHash": "sha256-+hu54pAoLDEZT9pjHlqL9DNzWz0NbUn8NEAHP7PQPzU=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "32ea77a06711b758da0ad9bd6a844c5740a87abd",
+        "rev": "b905f6fc23a9051a6e1b741e1438dbfc0634c6de",
         "type": "github"
       },
       "original": {
@@ -143,11 +143,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1738816619,
-        "narHash": "sha256-5yRlg48XmpcX5b5HesdGMOte+YuCy9rzQkJz+imcu6I=",
+        "lastModified": 1737590910,
+        "narHash": "sha256-qM/y6Dtpu9Wmf5HqeZajQdn+cS0aljdYQQQnrvx+LJE=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "2eccff41bab80839b1d25b303b53d339fbb07087",
+        "rev": "9368027715d8dde4b84c79c374948b5306fdd2db",
         "type": "github"
       },
       "original": {
@@ -195,23 +195,23 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1738452942,
-        "narHash": "sha256-vJzFZGaCpnmo7I6i416HaBLpC+hvcURh/BQwROcGIp8=",
+        "lastModified": 1735774519,
+        "narHash": "sha256-CewEm1o2eVAnoqb6Ml+Qi9Gg/EfNAxbRx1lANGVyoLI=",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
+        "url": "https://github.com/NixOS/nixpkgs/archive/e9b51731911566bbf7e4895475a87fe06961de0b.tar.gz"
       },
       "original": {
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/072a6db25e947df2f31aab9eccd0ab75d5b2da11.tar.gz"
+        "url": "https://github.com/NixOS/nixpkgs/archive/e9b51731911566bbf7e4895475a87fe06961de0b.tar.gz"
       }
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1739214665,
-        "narHash": "sha256-26L8VAu3/1YRxS8MHgBOyOM8xALdo6N0I04PgorE7UM=",
+        "lastModified": 1737469691,
+        "narHash": "sha256-nmKOgAU48S41dTPIXAq0AHZSehWUn6ZPrUKijHAMmIk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "64e75cd44acf21c7933d61d7721e812eac1b5a0a",
+        "rev": "9e4d5190a9482a1fb9d18adf0bdb83c6e506eaab",
         "type": "github"
       },
       "original": {
@@ -239,11 +239,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1739206421,
-        "narHash": "sha256-PwQASeL2cGVmrtQYlrBur0U20Xy07uSWVnFup2PHnDs=",
+        "lastModified": 1737404927,
+        "narHash": "sha256-e1WgPJpIYbOuokjgylcsuoEUCB4Jl2rQXa2LUD6XAG8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "44534bc021b85c8d78e465021e21f33b856e2540",
+        "rev": "ae584d90cbd0396a422289ee3efb1f1c9d141dc3",
         "type": "github"
       },
       "original": {
diff --git a/nixos/machines/crash/configuration.nix b/nixos/machines/crash/configuration.nix
index cf64b00..6a49499 100644
--- a/nixos/machines/crash/configuration.nix
+++ b/nixos/machines/crash/configuration.nix
@@ -12,11 +12,10 @@
   # Setup nixbuild.net, since this laptop is somewhat under powered
   programs.ssh.extraConfig = ''
     Host eu.nixbuild.net
-      PubkeyAcceptedKeyTypes ssh-ed25519
-      ServerAliveInterval 60
-      IPQoS throughput
-      IdentityFile /home/nathan/.ssh/id_ed25519
-      ControlMaster auto
+    PubkeyAcceptedKeyTypes ssh-ed25519
+    ServerAliveInterval 60
+    IPQoS throughput
+    IdentityFile /home/nathan/.ssh/id_ed25519
   '';
   programs.ssh.knownHosts = {
     nixbuild = {
diff --git a/nixos/modules/ssh.nix b/nixos/modules/ssh.nix
index 79f663d..6fd3563 100644
--- a/nixos/modules/ssh.nix
+++ b/nixos/modules/ssh.nix
@@ -7,6 +7,7 @@
   services.openssh = {
     enable = true;
     settings = {
+      ciphers = ["chacha20-poly1305@openssh.com"];
       PermitRootLogin = "no";
       PasswordAuthentication = false;
     };