diff --git a/HISTORY.md b/HISTORY.md
index d67bc54..a9eee23 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,12 @@ unreleased
 ==========
 
   * Drop support for Node.js below 0.10
+  * deps: debug@3.1.0
+    - Add `DEBUG_HIDE_DATE` environment variable
+    - Change timer to per-namespace instead of global
+    - Change non-TTY date format
+    - Remove `DEBUG_FD` environment variable support
+    - Support 256 namespace colors
 
 2.3.10 / 2017-09-27
 ===================
diff --git a/package.json b/package.json
index 7f75b0b..d606adb 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "license": "MIT",
   "repository": "expressjs/method-override",
   "dependencies": {
-    "debug": "2.6.9",
+    "debug": "3.1.0",
     "methods": "~1.1.2",
     "parseurl": "~1.3.2",
     "vary": "~1.1.2"