diff --git a/package-lock.json b/package-lock.json
index c8c6a68..1655732 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,16 @@
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@@ -114,6 +124,12 @@
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@@ -245,6 +261,34 @@
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@@ -254,12 +298,24 @@
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@@ -977,6 +1033,58 @@
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+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.6.3.tgz",
+      "integrity": "sha512-3XfeQE/wNkvrIktn2Kf0869fC0BN6UpydVasGIeSm2B1Llihf7/0UfZM+eCkOw3P7bP4+qPgqhm7ZoxuJtFU0Q==",
       "dev": true
     },
     "xtend": {
@@ -10612,14 +12404,13 @@
     "yeast": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
-      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk=",
+      "integrity": "sha512-8HFIh676uyGYP6wP13R/j6OJ/1HwJ46snpvzE7aHAN3Ryqh2yX6Xox2B4CUmTwwOIzlG3Bs7ocsP5dZH/R1Qbg==",
       "dev": true
     },
     "ylru": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ylru/-/ylru-1.2.1.tgz",
-      "integrity": "sha512-faQrqNMzcPCHGVC2aaOINk13K+aaBDUPjGWl0teOXywElLjyVAB6Oe2jj62jHYtwsU49jXhScYbvPENK+6zAvQ==",
-      "dev": true
+      "integrity": "sha512-faQrqNMzcPCHGVC2aaOINk13K+aaBDUPjGWl0teOXywElLjyVAB6Oe2jj62jHYtwsU49jXhScYbvPENK+6zAvQ=="
     },
     "yup": {
       "version": "0.27.0",
diff --git a/package.json b/package.json
index e2d49ec..faed00b 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "eslint-config-prettier": "^6.11.0",
     "husky": "^1.0.0",
     "lint-staged": "^8.0.0",
-    "@open-wc/testing-karma": "^3.0.0",
+    "@open-wc/testing-karma": "^4.0.9",
     "deepmerge": "^3.2.0",
     "@open-wc/testing": "^2.0.0",
     "@open-wc/building-rollup": "^1.0.0",