diff --git a/package-lock.json b/package-lock.json
index 6ae37a9..4e8d277 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -528,11 +528,6 @@
         "upath": "^1.0.5"
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-      "integrity": "sha512-4ivwqHpIFJZBuhN3g/pEcdbnGUywkBblloGbkglyloVjjR3uT6tieI89MVOfbP2tHX5sgb01FuLgAOzebNlJNQ=="
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       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
@@ -741,9 +736,9 @@
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-      "resolved": "https://registry.npmjs.org/date-format/-/date-format-1.2.0.tgz",
-      "integrity": "sha1-YV6CjiM90aubua4JUODOzPpuytg="
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/date-format/-/date-format-4.0.3.tgz",
+      "integrity": "sha512-7P3FyqDcfeznLZp2b+OMitV9Sz2lUnsT87WaTat9nVwqsBkTzPG3lPLNwW3en6F4pHUiWzr6vb8CLhjdK9bcxQ=="
     },
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@@ -1251,6 +1246,11 @@
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+    "flatted": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.2.4.tgz",
+      "integrity": "sha512-8/sOawo8tJ4QOBX8YlQBMxL8+RLZfxMQOif9o0KUKTNTjMYElWPE0r/m5VNFxTRd0NSw8qSy8dajrwX4RYI1Hw=="
+    },
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       "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.6.1.tgz",
@@ -1302,6 +1302,23 @@
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       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
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+    "fs-extra": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-10.0.0.tgz",
+      "integrity": "sha512-C5owb14u9eJwizKGdchcDUQeFtlSHHthBk8pbX9Vc1PFZrLombudjDnNns88aYslCyF6IY5SUw3Roz6xShcEIQ==",
+      "requires": {
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^6.0.1",
+        "universalify": "^2.0.0"
+      },
+      "dependencies": {
+        "graceful-fs": {
+          "version": "4.2.9",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.9.tgz",
+          "integrity": "sha512-NtNxqUcXgpW2iMrfqSfR73Glt39K+BLwWsPs94yR63v45T0Wbej7eRmL5cWfwEgqXnmjQp3zaJTshdRW/qC2ZQ=="
+        }
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -1981,8 +1998,7 @@
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       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
-      "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==",
-      "dev": true
+      "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
     },
     "handle-thing": {
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@@ -2321,6 +2337,15 @@
       "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=",
       "dev": true
     },
+    "jsonfile": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
+      "requires": {
+        "graceful-fs": "^4.1.6",
+        "universalify": "^2.0.0"
+      }
+    },
     "kind-of": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
@@ -2392,24 +2417,29 @@
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-      "version": "3.0.6",
-      "resolved": "https://registry.npmjs.org/log4js/-/log4js-3.0.6.tgz",
-      "integrity": "sha512-ezXZk6oPJCWL483zj64pNkMuY/NcRX5MPiB0zE6tjZM137aeusrOnW1ecxgF9cmwMWkBMhjteQxBPoZBh9FDxQ==",
-      "requires": {
-        "circular-json": "^0.5.5",
-        "date-format": "^1.2.0",
-        "debug": "^3.1.0",
-        "rfdc": "^1.1.2",
-        "streamroller": "0.7.0"
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/log4js/-/log4js-6.4.0.tgz",
+      "integrity": "sha512-ysc/XUecZJuN8NoKOssk3V0cQ29xY4fra6fnigZa5VwxFsCsvdqsdnEuAxNN89LlHpbE4KUD3zGcn+kFqonSVQ==",
+      "requires": {
+        "date-format": "^4.0.3",
+        "debug": "^4.3.3",
+        "flatted": "^3.2.4",
+        "rfdc": "^1.3.0",
+        "streamroller": "^3.0.2"
       },
       "dependencies": {
         "debug": {
-          "version": "3.2.6",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
-          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+          "version": "4.3.3",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
+          "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
           "requires": {
-            "ms": "^2.1.1"
+            "ms": "2.1.2"
           }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
         }
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@@ -2509,7 +2539,8 @@
     "minimist": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
+      "dev": true
     },
     "mixin-deep": {
       "version": "1.3.1",
@@ -2536,6 +2567,7 @@
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
       "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "dev": true,
       "requires": {
         "minimist": "0.0.8"
       }
@@ -3163,9 +3195,9 @@
       "dev": true
     },
     "rfdc": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.1.2.tgz",
-      "integrity": "sha512-92ktAgvZhBzYTIK0Mja9uen5q5J3NRVMoDkJL2VMwq6SXjVCgqvQeVP2XAaUY6HT+XpQYeLSjb3UoitBryKmdA=="
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/rfdc/-/rfdc-1.3.0.tgz",
+      "integrity": "sha512-V2hovdzFbOi77/WajaSMXk2OLm+xNIeQdMMuB7icj7bk6zi2F8GGAxigcnDFpJHbNyNcgyJDiP+8nOrY5cZGrA=="
     },
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       "version": "5.1.2",
@@ -3568,24 +3600,13 @@
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     },
     "streamroller": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-0.7.0.tgz",
-      "integrity": "sha512-WREzfy0r0zUqp3lGO096wRuUp7ho1X6uo/7DJfTlEi0Iv/4gT7YHqXDjKC2ioVGBZtE8QzsQD9nx1nIuoZ57jQ==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-3.0.2.tgz",
+      "integrity": "sha512-ur6y5S5dopOaRXBuRIZ1u6GC5bcEXHRZKgfBjfCglMhmIf+roVCECjvkEYzNQOXIN2/JPnkMPW/8B3CZoKaEPA==",
       "requires": {
-        "date-format": "^1.2.0",
-        "debug": "^3.1.0",
-        "mkdirp": "^0.5.1",
-        "readable-stream": "^2.3.0"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "3.2.6",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
-          "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
-          "requires": {
-            "ms": "^2.1.1"
-          }
-        }
+        "date-format": "^4.0.3",
+        "debug": "^4.1.1",
+        "fs-extra": "^10.0.0"
       }
     },
     "string_decoder": {
@@ -3746,6 +3767,11 @@
         }
       }
     },
+    "universalify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+      "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
diff --git a/package.json b/package.json
index 3a3b194..8dc41b2 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "express-ejs-layouts": "^2.5.0",
     "express-session": "^1.15.6",
     "ip": "^1.1.5",
-    "log4js": "^3.0.6",
+    "log4js": "^6.4.0",
     "redis": "^2.8.0",
     "spdy": "^4.0.0",
     "tls": "0.0.1"