diff --git a/package-lock.json b/package-lock.json
index b8c1740..39a3e7d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -513,6 +513,11 @@
         "supports-color": "^5.3.0"
       }
     },
+    "charenc": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/charenc/-/charenc-0.0.2.tgz",
+      "integrity": "sha1-wKHS86cJLgN3S/qD8UwPxXkKhmc="
+    },
     "check-error": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
@@ -625,6 +630,11 @@
         "which": "^2.0.1"
       }
     },
+    "crypt": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/crypt/-/crypt-0.0.2.tgz",
+      "integrity": "sha1-iNf/fsDfuG9xPch7u0LQRNPmxBs="
+    },
     "css-select": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/css-select/-/css-select-3.1.2.tgz",
@@ -1289,6 +1299,11 @@
         "binary-extensions": "^2.0.0"
       }
     },
+    "is-buffer": {
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/is-buffer/-/is-buffer-1.1.6.tgz",
+      "integrity": "sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w=="
+    },
     "is-extglob": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
@@ -1627,6 +1642,16 @@
         "semver": "^6.0.0"
       }
     },
+    "md5": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/md5/-/md5-2.3.0.tgz",
+      "integrity": "sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==",
+      "requires": {
+        "charenc": "0.0.2",
+        "crypt": "0.0.2",
+        "is-buffer": "~1.1.6"
+      }
+    },
     "minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
diff --git a/package.json b/package.json
index 2820e4b..0027053 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "cheerio": "^1.0.0-rc.3",
     "log4js": "^6.3.0",
     "luxon": "^1.25.0",
+    "md5": "^2.3.0",
     "tough-cookie": "^4.0.0"
   },
   "devDependencies": {