diff --git a/backend/package-lock.json b/backend/package-lock.json
index b221c41..74464d2 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -38,6 +38,16 @@
         "qs": "6.2.0",
         "raw-body": "~2.1.7",
         "type-is": "~1.6.13"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        }
       }
     },
     "bytes": {
@@ -75,11 +85,18 @@
       "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
     },
     "debug": {
-      "version": "2.2.0",
-      "resolved": "http://registry.npm.taobao.org/debug/download/debug-2.2.0.tgz",
-      "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
       "requires": {
-        "ms": "0.7.1"
+        "ms": "2.0.0"
+      },
+      "dependencies": {
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
+        }
       }
     },
     "depd": {
@@ -149,6 +166,14 @@
           "resolved": "http://registry.npm.taobao.org/cookie/download/cookie-0.1.5.tgz",
           "integrity": "sha1-armUiksa4hlSzSWIUwpHItQETXw="
         },
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        },
         "qs": {
           "version": "4.0.0",
           "resolved": "http://registry.npm.taobao.org/qs/download/qs-4.0.0.tgz",
@@ -165,6 +190,16 @@
         "escape-html": "~1.0.3",
         "on-finished": "~2.3.0",
         "unpipe": "~1.0.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        }
       }
     },
     "forwarded": {
@@ -245,6 +280,16 @@
         "depd": "~1.1.0",
         "on-finished": "~2.3.0",
         "on-headers": "~1.0.1"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        }
       }
     },
     "ms": {
@@ -340,6 +385,14 @@
         "statuses": "~1.2.1"
       },
       "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        },
         "http-errors": {
           "version": "1.3.1",
           "resolved": "http://registry.npm.taobao.org/http-errors/download/http-errors-1.3.1.tgz",
@@ -410,6 +463,16 @@
             "on-finished": "~2.3.0",
             "range-parser": "~1.0.3",
             "statuses": "~1.2.1"
+          },
+          "dependencies": {
+            "debug": {
+              "version": "2.2.0",
+              "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+              "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+              "requires": {
+                "ms": "0.7.1"
+              }
+            }
           }
         },
         "statuses": {
diff --git a/backend/package.json b/backend/package.json
index b7e5037..f6a1d95 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -8,7 +8,7 @@
   "dependencies": {
     "body-parser": "~1.15.1",
     "cookie-parser": "~1.4.3",
-    "debug": "~2.2.0",
+    "debug": "~2.6.9",
     "ejs": "~2.4.1",
     "express": "~4.13.4",
     "morgan": "~1.7.0",