diff --git a/package-lock.json b/package-lock.json
index eeb709c..a46cd69 100644
--- a/package-lock.json
+++ b/package-lock.json
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             "safe-buffer": "5.0.1"
           }
@@ -4972,6 +5043,7 @@
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -4988,6 +5060,7 @@
           "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
           "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -5049,7 +5122,8 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
           "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -5082,7 +5156,8 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
           "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -5946,6 +6021,11 @@
         "meow": "3.7.0"
       }
     },
+    "internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg=="
+    },
     "interpret": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/interpret/-/interpret-1.1.0.tgz",
@@ -9755,6 +9835,11 @@
         "inherits": "2.0.3"
       }
     },
+    "robust-predicates": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/robust-predicates/-/robust-predicates-3.0.1.tgz",
+      "integrity": "sha512-ndEIpszUHiG4HtDsQLeIuMvRsDnn8c8rYStabochtUeCvfuvNptb5TUbVD68LRAILPX7p9nqQGh4xJgn3EHS/g=="
+    },
     "run-queue": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/run-queue/-/run-queue-1.0.3.tgz",
@@ -9767,7 +9852,7 @@
     "rw": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
-      "integrity": "sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q="
+      "integrity": "sha512-PdhdWy89SiZogBLaw42zdeqtRJ//zFd2PgQavcICDUgJT5oW10QCRKbJ6bg4r0/UY2M6BWd5tkxuGFRvCkgfHQ=="
     },
     "rxjs": {
       "version": "5.5.7",
@@ -9791,6 +9876,11 @@
         "ret": "0.1.15"
       }
     },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+    },
     "sanitize-html": {
       "version": "1.15.0",
       "resolved": "https://registry.npmjs.org/sanitize-html/-/sanitize-html-1.15.0.tgz",
@@ -13128,11 +13218,6 @@
       "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.4.tgz",
       "integrity": "sha1-UZy0ymhtAFqEINNJbz8MruzKWA8="
     },
-    "xmlhttprequest": {
-      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
-      "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw="
-    },
     "xmlhttprequest-ssl": {
       "version": "1.5.4",
       "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.4.tgz",
diff --git a/package.json b/package.json
index 2e6f0fe..0dde0aa 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "connect-timeout": "^1.9.0",
     "cookie-parser": "^1.4.3",
     "core-js": "^2.4.1",
-    "d3": "^4.13.0",
+    "d3": "^7.6.1",
     "debug": "^3.1.0",
     "express": "^4.16.3",
     "extract-zip": "^1.6.6",