diff --git a/nvchecker/get_version.py b/nvchecker/get_version.py
index 96be522..b8a75b5 100644
--- a/nvchecker/get_version.py
+++ b/nvchecker/get_version.py
@@ -42,13 +42,16 @@ async def get_version(name, conf, **kwargs):
   for key in handler_precedence:
     if key in conf:
       func = import_module('.source.' + key, __package__).get_version
-      version = await func(name, conf, **kwargs)
-      if version:
-        version = version.replace('\n', ' ')
-        try:
-          version = substitute_version(version, name, conf)
-        except (ValueError, re.error):
-          logger.exception('error occurred in version substitutions', name=name)
-      return version
+      break
   else:
     logger.error('no idea to get version info.', name=name)
+    return
+
+  version = await func(name, conf, **kwargs)
+  if version:
+    version = version.replace('\n', ' ')
+    try:
+      version = substitute_version(version, name, conf)
+    except (ValueError, re.error):
+      logger.exception('error occurred in version substitutions', name=name)
+  return version
diff --git a/nvchecker/source/gitlab.py b/nvchecker/source/gitlab.py
index 4674b3a..9c79ce7 100644
--- a/nvchecker/source/gitlab.py
+++ b/nvchecker/source/gitlab.py
@@ -2,7 +2,6 @@
 # Copyright (c) 2013-2018 lilydjwg <lilydjwg@gmail.com>, et al.
 
 import os
-import time
 import urllib.parse
 
 import structlog
@@ -66,7 +65,7 @@ def check_ratelimit(exc, name):
     raise
 
   # default -1 is used to re-raise the exception
-  n = int(res.headers.get('RateLimit-Remaining'), -1)
+  n = int(res.headers.get('RateLimit-Remaining', -1))
   if n == 0:
     logger.error('rate limited, resetting at (unknown). '
                  'Or get an API token to increase the allowance if not yet',