diff --git a/hangeulro-server/package-lock.json b/hangeulro-server/package-lock.json
index a1d89bf..d17f2ec 100644
--- a/hangeulro-server/package-lock.json
+++ b/hangeulro-server/package-lock.json
@@ -943,6 +943,16 @@
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         "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",
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+          "requires": {
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+          }
+        }
       }
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     "brace-expansion": {
@@ -1132,11 +1142,18 @@
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     "debug": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
-      "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+      "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
       "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": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
+        }
       }
     },
     "depd": {
@@ -1529,6 +1546,16 @@
         "array-series": "0.1.5",
         "cross-spawn": "4.0.0",
         "debug": "2.2.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
+          "integrity": "sha512-X0rGvJcskG1c3TgSCPqHJ0XJgwlcvOC7elJ5Y0hYuKBZoVqWpAMfLOeIh2UI/DCQ5ruodIjvsugZtjUYUw2pUw==",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        }
       }
     },
     "graceful-fs": {
@@ -1918,6 +1945,16 @@
         "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": "sha512-X0rGvJcskG1c3TgSCPqHJ0XJgwlcvOC7elJ5Y0hYuKBZoVqWpAMfLOeIh2UI/DCQ5ruodIjvsugZtjUYUw2pUw==",
+          "requires": {
+            "ms": "0.7.1"
+          }
+        }
       }
     },
     "mpath": {
diff --git a/hangeulro-server/package.json b/hangeulro-server/package.json
index 0966d2f..f282722 100644
--- a/hangeulro-server/package.json
+++ b/hangeulro-server/package.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "body-parser": "~1.15.1",
     "cookie-parser": "~1.4.3",
-    "debug": "~2.2.0",
+    "debug": "~3.1.0",
     "ejs": "*",
     "express": "~4.15.2",
     "gm": "^1.23.0",