diff --git a/package-lock.json b/package-lock.json
index 2673f621..415d5fc3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7741,6 +7741,7 @@
       "version": "1.0.35",
       "resolved": "https://registry.npmjs.org/node-webcrypto-ossl/-/node-webcrypto-ossl-1.0.35.tgz",
       "integrity": "sha1-FCJVeb0J9dY7CtbO4LqAD4xqBg0=",
+      "optional": true,
       "requires": {
         "mkdirp": "0.5.1",
         "nan": "2.9.2",
@@ -11992,6 +11993,7 @@
       "version": "0.1.19",
       "resolved": "https://registry.npmjs.org/webcrypto-core/-/webcrypto-core-0.1.19.tgz",
       "integrity": "sha1-8CTjoCu8oW3tRtJpaMQlNaORJNw=",
+      "optional": true,
       "requires": {
         "tslib": "1.9.0"
       }