diff --git a/nhentai/cmdline.py b/nhentai/cmdline.py
index 4bd4f47..ad61f3e 100644
--- a/nhentai/cmdline.py
+++ b/nhentai/cmdline.py
@@ -77,9 +77,9 @@ def cmd_parser():
     # page options
     parser.add_option('--page-all', dest='page_all', action='store_true', default=False,
                       help='all search results')
-    parser.add_option('--page', '--page-range', type='string', dest='page', action='store', default='',
+    parser.add_option('--page', '--page-range', type='string', dest='page', action='store', default='1',
                       help='page number of search results. e.g. 1,2-5,14')
-    parser.add_option('--sorting', dest='sorting', action='store', default='popular',
+    parser.add_option('--sorting', '--sort', dest='sorting', action='store', default='popular',
                       help='sorting of doujinshi (recent / popular / popular-[today|week])',
                       choices=['recent', 'popular', 'popular-today', 'popular-week', 'date'])
 
diff --git a/nhentai/command.py b/nhentai/command.py
index 32032d2..ca8cc41 100644
--- a/nhentai/command.py
+++ b/nhentai/command.py
@@ -39,7 +39,6 @@ def main():
 
     doujinshis = []
     doujinshi_ids = []
-    doujinshi_list = []
 
     page_list = paging(options.page)
 
diff --git a/nhentai/constant.py b/nhentai/constant.py
index c5c9092..eb80b5e 100644
--- a/nhentai/constant.py
+++ b/nhentai/constant.py
@@ -5,6 +5,7 @@ import tempfile
 from urllib.parse import urlparse
 
 
+DEBUG = os.getenv('DEBUG', False)
 BASE_URL = os.getenv('NHENTAI', 'https://nhentai.net')
 
 DETAIL_URL = f'{BASE_URL}/g'
diff --git a/nhentai/parser.py b/nhentai/parser.py
index 988ba80..361d29d 100644
--- a/nhentai/parser.py
+++ b/nhentai/parser.py
@@ -292,12 +292,19 @@ def search_parser(keyword, sorting, page, is_page_all=False):
             try:
                 url = request('get', url=constant.SEARCH_URL, params={'query': keyword,
                                                                       'page': p, 'sort': sorting}).url
+
+                if constant.DEBUG:
+                    logger.debug(f'Request URL: {url}')
+
                 response = request('get', url.replace('%2B', '+')).json()
             except Exception as e:
                 logger.critical(str(e))
                 response = None
             break
 
+        if constant.DEBUG:
+            logger.debug(f'Response: {response}')
+
         if response is None or 'result' not in response:
             logger.warning(f'No result in response in page {p}')
             if not_exists_persist is True: