diff --git a/src/package-lock.json b/src/package-lock.json
index 0a7b9210d..6ae3ebb41 100644
--- a/src/package-lock.json
+++ b/src/package-lock.json
@@ -1517,6 +1517,11 @@
         "whatwg-url": "^10.0.0"
       }
     },
+    "date-format": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/date-format/-/date-format-4.0.3.tgz",
+      "integrity": "sha512-7P3FyqDcfeznLZp2b+OMitV9Sz2lUnsT87WaTat9nVwqsBkTzPG3lPLNwW3en6F4pHUiWzr6vb8CLhjdK9bcxQ=="
+    },
     "date-utils": {
       "version": "1.2.21",
       "resolved": "https://registry.npmjs.org/date-utils/-/date-utils-1.2.21.tgz",
@@ -2514,8 +2519,7 @@
     "flatted": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.2.4.tgz",
-      "integrity": "sha512-8/sOawo8tJ4QOBX8YlQBMxL8+RLZfxMQOif9o0KUKTNTjMYElWPE0r/m5VNFxTRd0NSw8qSy8dajrwX4RYI1Hw==",
-      "dev": true
+      "integrity": "sha512-8/sOawo8tJ4QOBX8YlQBMxL8+RLZfxMQOif9o0KUKTNTjMYElWPE0r/m5VNFxTRd0NSw8qSy8dajrwX4RYI1Hw=="
     },
     "follow-redirects": {
       "version": "1.14.6",
@@ -2558,6 +2562,23 @@
       "integrity": "sha512-y6OAwoSIf7FyjMIv94u+b5rdheZEjzR63GTyZJm5qh4Bi+2YgwLCcI/fPFZkL5PSixOt6ZNKm+w+Hfp/Bciwow==",
       "optional": true
     },
+    "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": {
+        "universalify": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+          "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+        }
+      }
+    },
     "fs-minipass": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-2.1.0.tgz",
@@ -2707,8 +2728,7 @@
     "graceful-fs": {
       "version": "4.2.8",
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.8.tgz",
-      "integrity": "sha512-qkIilPUYcNhJpd33n0GBXTB1MMPp14TxEsEs0pTrsSVucApsYzW5V+Q8Qxhik6KU3evy+qkAAowTByymK0avdg==",
-      "optional": true
+      "integrity": "sha512-qkIilPUYcNhJpd33n0GBXTB1MMPp14TxEsEs0pTrsSVucApsYzW5V+Q8Qxhik6KU3evy+qkAAowTByymK0avdg=="
     },
     "growl": {
       "version": "1.10.5",
@@ -3164,7 +3184,8 @@
     "isarray": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
+      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+      "dev": true
     },
     "isexe": {
       "version": "2.0.0",
@@ -3313,6 +3334,22 @@
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
       "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus="
     },
+    "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"
+      },
+      "dependencies": {
+        "universalify": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+          "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+        }
+      }
+    },
     "jsonminify": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/jsonminify/-/jsonminify-0.4.1.tgz",
@@ -3632,18 +3669,29 @@
       }
     },
     "log4js": {
-      "version": "0.6.38",
-      "resolved": "https://registry.npmjs.org/log4js/-/log4js-0.6.38.tgz",
-      "integrity": "sha1-LElBFmldb7JUgJQ9P8hy5mKlIv0=",
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/log4js/-/log4js-6.4.0.tgz",
+      "integrity": "sha512-ysc/XUecZJuN8NoKOssk3V0cQ29xY4fra6fnigZa5VwxFsCsvdqsdnEuAxNN89LlHpbE4KUD3zGcn+kFqonSVQ==",
       "requires": {
-        "readable-stream": "~1.0.2",
-        "semver": "~4.3.3"
+        "date-format": "^4.0.3",
+        "debug": "^4.3.3",
+        "flatted": "^3.2.4",
+        "rfdc": "^1.3.0",
+        "streamroller": "^3.0.2"
       },
       "dependencies": {
-        "semver": {
-          "version": "4.3.6",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.6.tgz",
-          "integrity": "sha1-MAvG4OhjdPe6YQaLWx7NV/xlMto="
+        "debug": {
+          "version": "4.3.3",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
+          "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
+          "requires": {
+            "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=="
         }
       }
     },
@@ -7751,17 +7799,6 @@
         }
       }
     },
-    "readable-stream": {
-      "version": "1.0.34",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
-      "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
-      "requires": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.1",
-        "isarray": "0.0.1",
-        "string_decoder": "~0.10.x"
-      }
-    },
     "readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -8462,6 +8499,31 @@
       "resolved": "https://registry.npmjs.org/stoppable/-/stoppable-1.1.0.tgz",
       "integrity": "sha512-KXDYZ9dszj6bzvnEMRYvxgeTHU74QBFL54XKtP3nyMuJ81CFYtABZ3bAzL2EdFUaEwJOBOgENyFj3R7oTzDyyw=="
     },
+    "streamroller": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-3.0.2.tgz",
+      "integrity": "sha512-ur6y5S5dopOaRXBuRIZ1u6GC5bcEXHRZKgfBjfCglMhmIf+roVCECjvkEYzNQOXIN2/JPnkMPW/8B3CZoKaEPA==",
+      "requires": {
+        "date-format": "^4.0.3",
+        "debug": "^4.1.1",
+        "fs-extra": "^10.0.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.3.3",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
+          "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
+          "requires": {
+            "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=="
+        }
+      }
+    },
     "string-width": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
@@ -8472,11 +8534,6 @@
         "strip-ansi": "^6.0.1"
       }
     },
-    "string_decoder": {
-      "version": "0.10.31",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
-      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
-    },
     "stringify-entities": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/stringify-entities/-/stringify-entities-3.1.0.tgz",
diff --git a/src/package.json b/src/package.json
index fc74675dc..8b47f9b69 100644
--- a/src/package.json
+++ b/src/package.json
@@ -49,7 +49,7 @@
     "jsonminify": "0.4.1",
     "languages4translatewiki": "0.1.3",
     "lodash.clonedeep": "4.5.0",
-    "log4js": "0.6.38",
+    "log4js": "6.4.0",
     "measured-core": "^2.0.0",
     "mime-types": "^2.1.34",
     "npm": "^6.14.15",