diff --git a/public/service-monitoring.nix b/public/service-monitoring.nix
index a467fe2..417aaf1 100644
--- a/public/service-monitoring.nix
+++ b/public/service-monitoring.nix
@@ -11,6 +11,7 @@ mkIf true {
 
   # Paquets
   environment.systemPackages = with pkgs; [
+    bc
     mailutils
   ];