diff --git a/admin-dashboard.html b/admin-dashboard.html
index 93e8381..1c3e480 100644
--- a/admin-dashboard.html
+++ b/admin-dashboard.html
@@ -2610,14 +2610,21 @@ async function saveApp(event) {
     event.preventDefault();
     
     // Get form data
-    const formData = new FormData(document.getElementById('appForm'));
+    const form = document.getElementById('appForm');
+    const formData = new FormData(form);
     
     // Get app ID
     const appId = document.getElementById('appId').value;
     
     // Get icon class from the selected icon
     const iconClass = document.getElementById('appIcon').value;
-    formData.append('iconClass', iconClass);
+    formData.set('iconClass', iconClass);
+    
+    // Convert FormData to URL-encoded string
+    const urlEncoded = new URLSearchParams();
+    for (const [key, value] of formData.entries()) {
+        urlEncoded.append(key, value);
+    }
     
     // Create request URL
     const url = appId ? `/api/apps/${appId}` : '/api/apps';
@@ -2626,26 +2633,29 @@ async function saveApp(event) {
     const method = appId ? 'PUT' : 'POST';
     
     // Send request
-    fetch(url, {
-        method: method,
-        body: formData,
-        credentials: 'include'
-    })
-    .then(response => {
+    try {
+        const response = await fetch(url, {
+            method: method,
+            headers: {
+                'Content-Type': 'application/x-www-form-urlencoded',
+            },
+            body: urlEncoded.toString(),
+            credentials: 'include'
+        });
+        
         if (!response.ok) {
-            throw new Error('Network response was not ok');
+            const errorData = await response.json().catch(() => ({}));
+            throw new Error(errorData.error || 'Network response was not ok');
         }
-        return response.json();
-    })
-    .then(data => {
+        
+        const data = await response.json();
         showNotification('Aplikace byla úspěšně uložena', 'success');
         loadApps();
         closeAppModal();
-    })
-    .catch(error => {
+    } catch (error) {
         console.error('Error:', error);
-        showNotification('Chyba při ukládání aplikace', 'error');
-    });
+        showNotification(`Chyba při ukládání aplikace: ${error.message}`, 'error');
+    }
 }
 
 // Logout functionality