diff --git a/HISTORY.md b/HISTORY.md
index 0c84649..6b823f4 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,6 +1,8 @@
 unreleased
 ==========
 
+  * deps: debug@~2.1.0
+    - Implement `DEBUG_FD` env variable support
   * deps: mime-types@~2.0.2
     - deps: mime-db@~1.1.0
 
diff --git a/package.json b/package.json
index f89d577..3eb0b06 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "accepts": "~1.1.2",
     "batch": "0.5.1",
-    "debug": "~2.0.0",
+    "debug": "~2.1.0",
     "mime-types": "~2.0.2",
     "parseurl": "~1.3.0"
   },