diff --git a/package-lock.json b/package-lock.json
index 6e870b1..cef41e8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -903,6 +903,93 @@
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+    "write-file-atomic": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
     "ws": {
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
diff --git a/package.json b/package.json
index cfc54f8..a689d54 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "mocha": "^5.2.0",
     "mocha-headless-chrome": "^2.0.3",
     "npm-run-all": "^4.1.5",
-    "nyc": "^13.3.0",
+    "nyc": "^15.0.0",
     "rimraf": "^2.7.1",
     "wait-on": "^3.3.0",
     "webpack": "^4.41.4",