diff --git a/hosts/catbook-j/configuration.nix b/hosts/catbook-j/configuration.nix
index 0109deb..c258f4d 100644
--- a/hosts/catbook-j/configuration.nix
+++ b/hosts/catbook-j/configuration.nix
@@ -7,6 +7,9 @@
   lib,
   ...
 }: {
+  nixpkgs.config.permittedInsecurePackages = [
+    "electron-25.9.0"
+  ];
   imports = [
     # Include the results of the hardware scan.
     ./hardware-configuration.nix
@@ -52,7 +55,7 @@
 
   services.xserver.libinput.touchpad.tapping = false;
 
-  environment.systemPackages = [pkgs.vivaldi pkgs.vivaldi-ffmpeg-codecs pkgs.plantuml pkgs.mqttui pkgs.mobile-broadband-provider-info pkgs.modem-manager-gui pkgs.wireshark];
+  environment.systemPackages = [pkgs.plantuml pkgs.mqttui pkgs.mobile-broadband-provider-info pkgs.modem-manager-gui pkgs.wireshark];
 
   # Bootloader.
   boot.loader.systemd-boot.enable = true;