diff --git a/lib/common/utils.js b/lib/common/utils.js
index 9a8bcee..aa2464e 100644
--- a/lib/common/utils.js
+++ b/lib/common/utils.js
@@ -186,8 +186,8 @@ function isWhiteSpace(code) {
 var UNICODE_PUNCT_RE = require('uc.micro/categories/P/regex');
 
 // Currently without astral characters support.
-function isPunctChar(char) {
-  return UNICODE_PUNCT_RE.test(char);
+function isPunctChar(ch) {
+  return UNICODE_PUNCT_RE.test(ch);
 }
 
 
diff --git a/package.json b/package.json
index 45e5547..2be36f0 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "argparse": "~1.0.2",
     "entities": "~1.1.1",
     "linkify-it": "~1.2.0",
-    "mdurl": "~1.0.0",
+    "mdurl": "~1.0.1",
     "uc.micro": "^1.0.0"
   },
   "devDependencies": {