diff --git a/docs/usage.rst b/docs/usage.rst
index db7c643..994044b 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -838,7 +838,7 @@ Check Mercurial repository
 
   source = "mercurial"
 
-This enables you to check tags of an arbitrary mercurial repository.
+This enables you to check tags of an arbitrary mercurial (hg) repository.
 
 mercurial
   URL of the Mercurial repository.
diff --git a/nvchecker_source/mercurial.py b/nvchecker_source/mercurial.py
index db3cd34..92342c8 100644
--- a/nvchecker_source/mercurial.py
+++ b/nvchecker_source/mercurial.py
@@ -2,7 +2,7 @@
 # Copyright (c) 2020 Felix Yan <felixonmars@archlinux.org>, et al.
 
 async def get_version(name, conf, *, cache, **kwargs):
-  url = conf.get('mercurial') + '/json-tags'
+  url = conf['mercurial'] + '/json-tags'
 
   data = await cache.get_json(url)