diff --git a/.github/workflows/sync.yml b/.github/workflows/sync.yml
index 3d94e1f..0488117 100644
--- a/.github/workflows/sync.yml
+++ b/.github/workflows/sync.yml
@@ -14,17 +14,16 @@ jobs:
       - name: Checkout repo
         uses: actions/checkout@v4
 
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v3
         with:
-          python-version: '3.12'
-          cache: 'pip'
+          python-version: "3.13"
 
       - name: Install dependencies
-        run: pip install httpx python-dotenv
+        run: uv sync --frozen
 
       - name: Run sync script
         env:
           TOKEN: ${{ secrets.TOKEN }}
           PROFILE: ${{ secrets.PROFILE }}
-        run: python main.py
+        run: uv run python main.py
diff --git a/README.md b/README.md
index d15c930..1b99066 100644
--- a/README.md
+++ b/README.md
@@ -69,5 +69,5 @@ The included GitHub Actions workflow (`.github/workflows/ci.yml`) runs a dry-run
    - `PROFILE`: your Control D profile ID(s)
 
 ## Requirements
-- Python 3.12+
+- Python 3.13+
 - `uv` (for dependency management)
diff --git a/main.py b/main.py
index 5436ebe..32b008b 100644
--- a/main.py
+++ b/main.py
@@ -18,6 +18,7 @@
 import os
 import logging
 import time
+import concurrent.futures
 import re
 from typing import Dict, List, Optional, Any, Set, Sequence
 
@@ -350,14 +351,31 @@ def sync_profile(
     try:
         # Fetch all folder data first
         folder_data_list = []
-        for url in folder_urls:
-            if not validate_folder_url(url):
-                continue
+
+        # Validate URLs first
+        valid_urls = [url for url in folder_urls if validate_folder_url(url)]
+        
+        invalid_count = len(folder_urls) - len(valid_urls)
+        if invalid_count > 0:
+            log.warning(f"Filtered out {invalid_count} invalid URL(s)")
+        
+        if not valid_urls:
+            log.error("No valid folder URLs to fetch")
+            return False
+
+        def safe_fetch(url):
             try:
-                folder_data_list.append(fetch_folder_data(url))
+                return fetch_folder_data(url)
             except (httpx.HTTPError, KeyError) as e:
                 log.error(f"Failed to fetch folder data from {url}: {e}")
-                continue
+                return None
+
+        # Fetch folder data in parallel to speed up startup
+        max_workers = min(10, len(valid_urls))
+        with concurrent.futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
+            results = executor.map(safe_fetch, valid_urls)
+
+        folder_data_list = [r for r in results if r is not None]
 
         if not folder_data_list:
             log.error("No valid folder data found")