diff --git a/packages/reservation-platform/src/app/admin/layout.tsx b/packages/reservation-platform/src/app/admin/layout.tsx
index 201bf0b..d969347 100644
--- a/packages/reservation-platform/src/app/admin/layout.tsx
+++ b/packages/reservation-platform/src/app/admin/layout.tsx
@@ -1,7 +1,7 @@
 import { AdminSidebar } from "@/app/admin/admin-sidebar";
 import { validateRequest } from "@/server/auth";
 import { UserRole } from "@/server/auth/permissions";
-import { guard, is_not } from "@/utils/heimdall";
+import { IS_NOT, guard } from "@/utils/guard";
 import { redirect } from "next/navigation";
 
 interface AdminLayoutProps {
@@ -14,7 +14,7 @@ export default async function AdminLayout(props: AdminLayoutProps) {
 	const { children } = props;
 	const { user } = await validateRequest();
 
-	if (guard(user, is_not, UserRole.ADMIN)) {
+	if (guard(user, IS_NOT, UserRole.ADMIN)) {
 		redirect("/");
 	}
 
diff --git a/packages/reservation-platform/src/utils/heimdall.ts b/packages/reservation-platform/src/utils/heimdall.ts
deleted file mode 100644
index 6168905..0000000
--- a/packages/reservation-platform/src/utils/heimdall.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-import type { UserRole } from "@/server/auth/permissions";
-import type { users } from "@/server/db/schema";
-import type { InferSelectModel } from "drizzle-orm";
-import type { RegisteredDatabaseUserAttributes } from "lucia";
-
-// Helpers to improve readability of the guard function
-export const is = false;
-export const is_not = true;
-
-/**
- * @deprecated
- */
-export function guard(
-	user: RegisteredDatabaseUserAttributes | InferSelectModel<typeof users> | undefined | null,
-	negate: boolean,
-	roleRequirements: UserRole | UserRole[],
-) {
-	if (!user) {
-		return true; // Guard against unauthenticated users
-	}
-
-	const hasRole = Array.isArray(roleRequirements)
-		? roleRequirements.includes(user?.role as UserRole)
-		: user?.role === roleRequirements;
-
-	return negate ? !hasRole : hasRole;
-}
-
-export class PermissionError extends Error {
-	constructor() {
-		super("Du besitzt nicht die erforderlichen Berechtigungen um diese Aktion auszuführen.");
-	}
-}