diff --git a/lib/context.js b/lib/context.js
index 11e7e8e..1b30f76 100644
--- a/lib/context.js
+++ b/lib/context.js
@@ -113,7 +113,7 @@ class ContextSession {
     } catch (err) {
       // backwards compatibility:
       // create a new session if parsing fails.
-      // `Buffer.alloc(size, string, 'base64')` does not seem to crash
+      // Buffer.alloc(size, string, 'base64') does not seem to crash
       // when `string` is not base64-encoded.
       // but `JSON.parse(string)` will crash.
       debug('decode %j error: %s', cookie, err);
diff --git a/package.json b/package.json
index d12da0b..4ab9d35 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "license": "MIT",
   "dependencies": {
     "crc": "^3.4.4",
-    "debug": "^2.2.0",
+    "debug": "^2.6.9",
     "is-type-of": "^1.0.0",
     "uid-safe": "^2.1.3"
   },