diff --git a/flake.lock b/flake.lock
index 053f9b0..f75c61d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -345,11 +345,11 @@
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1701952659,
-        "narHash": "sha256-TJv2srXt6fYPUjxgLAL0cy4nuf1OZD4KuA1TrCiQqg0=",
+        "lastModified": 1702233072,
+        "narHash": "sha256-H5G2wgbim2Ku6G6w+NSaQaauv6B6DlPhY9fMvArKqRo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b4372c4924d9182034066c823df76d6eaf1f4ec4",
+        "rev": "781e2a9797ecf0f146e81425c822dca69fe4a348",
         "type": "github"
       },
       "original": {
diff --git a/hosts/catbook-j/configuration.nix b/hosts/catbook-j/configuration.nix
index c258f4d..98104c5 100644
--- a/hosts/catbook-j/configuration.nix
+++ b/hosts/catbook-j/configuration.nix
@@ -55,7 +55,7 @@
 
   services.xserver.libinput.touchpad.tapping = false;
 
-  environment.systemPackages = [pkgs.plantuml pkgs.mqttui pkgs.mobile-broadband-provider-info pkgs.modem-manager-gui pkgs.wireshark];
+  environment.systemPackages = [pkgs.vivaldi pkgs.vivaldi-ffmpeg-codecs pkgs.plantuml pkgs.mqttui pkgs.mobile-broadband-provider-info pkgs.modem-manager-gui pkgs.wireshark];
 
   # Bootloader.
   boot.loader.systemd-boot.enable = true;