diff --git a/books/views.py b/books/views.py
index fdad268..a52b9b3 100644
--- a/books/views.py
+++ b/books/views.py
@@ -181,7 +181,7 @@ def book_highlights(request, pk):
         raw_size = len(base64.b64decode(ct))
     except Exception:
         return JsonResponse({'error': 'invalid base64 in ct'}, status=400)
-    if raw_size > 700 * 1024:
+    if raw_size > getattr(settings, 'HIGHLIGHTS_MAX_BYTES', 700 * 1024):
         return JsonResponse({'error': 'highlights data too large (max 700 KB)'}, status=400)
 
     row, _ = EBookHighlights.objects.get_or_create(user=request.user, book=book)
@@ -226,7 +226,7 @@ def book_bookmarks(request, pk):
         raw_size = len(base64.b64decode(ct))
     except Exception:
         return JsonResponse({'error': 'invalid base64 in ct'}, status=400)
-    if raw_size > 100 * 1024:
+    if raw_size > getattr(settings, 'BOOKMARKS_MAX_BYTES', 100 * 1024):
         return JsonResponse({'error': 'bookmarks data too large (max 100 KB)'}, status=400)
 
     row, _ = EBookBookmarks.objects.get_or_create(user=request.user, book=book)
diff --git a/diora/context_processors.py b/diora/context_processors.py
index d2d8abf..2c4a74c 100644
--- a/diora/context_processors.py
+++ b/diora/context_processors.py
@@ -9,4 +9,5 @@ def upload_limits(request):
     return {
         'EBOOK_MAX_BYTES': getattr(settings, 'EBOOK_MAX_BYTES', 10 * 1024 * 1024),
         'BG_MAX_BYTES': getattr(settings, 'BG_MAX_BYTES', 5 * 1024 * 1024),
+        'PODCAST_INBOX_PAGE_SIZE': getattr(settings, 'PODCAST_INBOX_PAGE_SIZE', 200),
     }
diff --git a/diora/settings.py b/diora/settings.py
index 79451ef..8aa8c36 100644
--- a/diora/settings.py
+++ b/diora/settings.py
@@ -101,7 +101,13 @@ STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'
 MEDIA_URL = '/media/'
 MEDIA_ROOT = BASE_DIR / 'media'
 
-BG_MAX_BYTES = 5 * 1024 * 1024  # 5 MB
+BG_MAX_BYTES = 5 * 1024 * 1024          # 5 MB
+HIGHLIGHTS_MAX_BYTES = 700 * 1024       # 700 KB
+BOOKMARKS_MAX_BYTES = 100 * 1024        # 100 KB
+
+VOLUME_DEFAULT = 204                    # out of 255
+ITUNES_TIMEOUT = 6                      # seconds
+PODCAST_INBOX_PAGE_SIZE = 200
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
 
diff --git a/podcasts/views.py b/podcasts/views.py
index 18d4841..299f0e8 100644
--- a/podcasts/views.py
+++ b/podcasts/views.py
@@ -145,7 +145,7 @@ def podcast_search(request):
 
     try:
         url = f'https://itunes.apple.com/search?term={urllib.parse.quote(q)}&media=podcast&limit=20'
-        resp = requests.get(url, timeout=6)
+        resp = requests.get(url, timeout=getattr(settings, 'ITUNES_TIMEOUT', 6))
         resp.raise_for_status()
         raw = resp.json().get('results', [])
     except Exception as e:
@@ -620,7 +620,7 @@ def inbox(request):
         ).values_list('episode_id', flat=True)
     )
 
-    limit = min(int(request.GET.get('limit', 200)), 1000)
+    limit = min(int(request.GET.get('limit', getattr(settings, 'PODCAST_INBOX_PAGE_SIZE', 200))), 1000)
     offset = max(int(request.GET.get('offset', 0)), 0)
 
     episodes = list(
diff --git a/radio/views.py b/radio/views.py
index af6a122..669fcf5 100644
--- a/radio/views.py
+++ b/radio/views.py
@@ -206,7 +206,7 @@ def affiliate_links(request):
             f"https://itunes.apple.com/search"
             f"?term={urllib.parse.quote(track)}&media=music&limit=1"
         )
-        resp = requests.get(itunes_url, timeout=5)
+        resp = requests.get(itunes_url, timeout=getattr(settings, 'ITUNES_TIMEOUT', 6))
         resp.raise_for_status()
         results = resp.json().get('results', [])
         if results:
@@ -584,9 +584,10 @@ def import_m3u(request):
 def stream_player(request):
     url  = request.GET.get('url',  '').strip()
     name = request.GET.get('name', '').strip()
-    vol  = request.GET.get('vol',  '204').strip()
+    _vol_default = getattr(settings, 'VOLUME_DEFAULT', 204)
+    vol  = request.GET.get('vol',  str(_vol_default)).strip()
     try:
         vol = max(0, min(255, int(vol)))
     except ValueError:
-        vol = 204
+        vol = _vol_default
     return render(request, 'radio/stream_player.html', {'stream_url': url, 'stream_name': name, 'stream_vol': vol})
diff --git a/static/js/app.js b/static/js/app.js
index 7bb5afc..531d80e 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -1590,7 +1590,7 @@ async function savePodcastProgress() {
 }
 
 let _inboxOffset = 0;
-const _inboxPageSize = 200;
+const _inboxPageSize = DIORA_CONFIG.podcastInboxPageSize;
 
 async function loadAndRenderInbox(append = false) {
   const listEl = $('podcast-inbox-list');
diff --git a/templates/base.html b/templates/base.html
index 6ed5950..509e3c3 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -13,7 +13,7 @@
   <link rel="apple-touch-icon" href="/static/icon-192.png">
   <link rel="stylesheet" href="/static/css/app.css">
   <title>{% block title %}diora{% endblock %}</title>
-  <script>const DIORA_CONFIG = { ebookMaxBytes: {{ EBOOK_MAX_BYTES }}, bgMaxBytes: {{ BG_MAX_BYTES }} };</script>
+  <script>const DIORA_CONFIG = { ebookMaxBytes: {{ EBOOK_MAX_BYTES }}, bgMaxBytes: {{ BG_MAX_BYTES }}, podcastInboxPageSize: {{ PODCAST_INBOX_PAGE_SIZE }} };</script>
   {% if encrypted_bg_json %}
   <script>const ENCRYPTED_BG = {{ encrypted_bg_json|safe }};</script>
   {% endif %}