diff --git a/src/components/Header.tsx b/src/components/Header.tsx
index cbcf7b1..58f89bf 100644
--- a/src/components/Header.tsx
+++ b/src/components/Header.tsx
@@ -9,35 +9,52 @@ import {
     Repository
 } from '../types';
 
+import {
+    MIRRORS
+} from '../services/api';
+
 interface HeaderProps {
-  onRepositoryChange: (repo: Repository) => void;
+    onRepositoryChange: (repo: Repository) => void;
 }
 
-export function Header({ onRepositoryChange }: HeaderProps): JSX.Element {
-  return (
-    <header className="bg-gradient-to-r from-nord-9 to-nord-8 via-nord-10 text-nord-6 shadow-lg">
-      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-4">
-        <div className="flex items-center justify-between">
-          {/* Logo Section */}
-          <div className="flex items-center gap-4">
-            <Logo />
-          </div>
+export function Header({
+    onRepositoryChange
+}: HeaderProps): JSX.Element {
+    const usedRepositories = new Set(Object.values(MIRRORS).map(mirror => mirror.repository));
+    
+    const filteredRepository = Object.keys(Repository).reduce((acc, key) => {
+        // This code is flawed because it explicitly checks for 'ALL', reducing flexibility.
+        // A more generic approach should be used to filter unused repositories while preserving 'ALL'.
+        if ((key === 'ALL') || usedRepositories.has(Repository[key as keyof typeof Repository])) acc[key] = Repository[key as keyof typeof Repository];
+        return acc;
+    }, {} as Record<string, string>);
 
-          {/* Repository Filter Dropdown */}
-          <div>
-            <select onChange={
-                (e) => onRepositoryChange(e.target.value as Repository)
-            } defaultValue="all" className="bg-nord-5 dark:bg-nord-1 text-black dark:text-white border-2 border-nord-4 dark:border-nord-2 rounded-lg py-2 px-4 focus:ring-2 focus:ring-nord-8">
-                {Object.values(Repository).map((repository) => (
-                    <option key={repository} value={repository}>{((repository === Repository.ALL) ? 'All Repositories' : repository.charAt(0).toUpperCase() + repository.slice(1))}</option>
-                ))}
-            </select>
-          </div>
+    return (
+        <header className="bg-gradient-to-r from-nord-9 to-nord-8 via-nord-10 text-nord-6 shadow-lg">
+            <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-4">
+                <div className="flex items-center justify-between">
+                    {/* Logo Section */}
 
-          {/* Theme Toggle */}
-          <ThemeToggle />
-        </div>
-      </div>
-    </header>
-  );
+                    <div className="flex items-center gap-4">
+                        <Logo />
+                    </div>
+
+                    {/* Repository Filter Dropdown */}
+
+                    <div>
+                        <select onChange={
+                            (e) => onRepositoryChange(e.target.value as Repository)
+                        } defaultValue="all" className="bg-nord-5 dark:bg-nord-1 text-black dark:text-white border-2 border-nord-4 dark:border-nord-2 rounded-lg py-2 px-4 focus:ring-2 focus:ring-nord-8">
+                            {Object.values(filteredRepository).map((repository) => (
+                                <option key={repository} value={repository}>{((repository === Repository.ALL) ? 'All Repositories' : repository.charAt(0).toUpperCase() + repository.slice(1))}</option>
+                            ))}
+                        </select>
+                    </div>
+
+                    {/* Theme Toggle */}
+                    <ThemeToggle />
+                </div>
+            </div>
+        </header>
+    );
 }
diff --git a/src/services/api.ts b/src/services/api.ts
index aaf7c4a..26dea7a 100644
--- a/src/services/api.ts
+++ b/src/services/api.ts
@@ -4,14 +4,10 @@ import {
 } from '../types';
 
 // Define the mirrors from which packages will be fetched
-const MIRRORS: Record<string, {
+export const MIRRORS: Record<string, {
     url: string;
     repository: Repository;
 }> = {
-    /**
-     * Сейчас данный код будет удобным вариантом,
-     * чтобы убрать убирать пустые (неиспользуемые) репозитории из главной страницы
-     */
     'core': {
         url: 'https://raw.githubusercontent.com/Snigdha-OS/snigdhaos-core/refs/heads/master/packages.txt',
         repository: ('core' as Repository)