diff --git a/package-lock.json b/package-lock.json
index 249bdcd..4638805 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1993,20 +1993,12 @@
       "dev": true
     },
     "debug": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
       "dev": true,
       "requires": {
-        "ms": "2.0.0"
-      },
-      "dependencies": {
-        "ms": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
-          "dev": true
-        }
+        "ms": "^2.1.1"
       }
     },
     "decamelize": {
@@ -3206,12 +3198,27 @@
         "unpipe": "~1.0.0"
       },
       "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "dev": true,
+          "requires": {
+            "ms": "2.0.0"
+          }
+        },
         "ee-first": {
           "version": "1.1.1",
           "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
           "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=",
           "dev": true
         },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
+        },
         "on-finished": {
           "version": "2.3.0",
           "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
@@ -5084,6 +5091,15 @@
                 "raw-body": "2.3.2",
                 "type-is": "~1.6.15"
               }
+            },
+            "debug": {
+              "version": "2.6.9",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+              "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+              "dev": true,
+              "requires": {
+                "ms": "2.0.0"
+              }
             }
           }
         },
@@ -5307,6 +5323,17 @@
             "on-finished": "~2.3.0",
             "range-parser": "~1.2.0",
             "statuses": "~1.4.0"
+          },
+          "dependencies": {
+            "debug": {
+              "version": "2.6.9",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+              "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+              "dev": true,
+              "requires": {
+                "ms": "2.0.0"
+              }
+            }
           }
         },
         "string_decoder": {
@@ -7885,6 +7912,17 @@
             "on-finished": "~2.3.0",
             "range-parser": "~1.2.0",
             "statuses": "~1.4.0"
+          },
+          "dependencies": {
+            "debug": {
+              "version": "2.6.9",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+              "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+              "dev": true,
+              "requires": {
+                "ms": "2.0.0"
+              }
+            }
           }
         }
       }
diff --git a/package.json b/package.json
index 2a4570a..6a4b85c 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "benchmark": "^2.0.0",
     "bson": "^1.0.5",
     "coveralls": "^2.11.2",
-    "debug": "^2.2.0",
+    "debug": "^4.1.1",
     "eslint-config-mongodb-js": "^5.0.3",
     "istanbul": "^0.4.5",
     "mocha": "^3.1.2",