diff --git a/package-lock.json b/package-lock.json
index 279e75e0a0..d6bab30c34 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9537,9 +9537,9 @@
       }
     },
     "es-dev-server": {
-      "version": "1.50.5",
-      "resolved": "https://registry.npmjs.org/es-dev-server/-/es-dev-server-1.50.5.tgz",
-      "integrity": "sha512-BuNOSAYRF3MOhw/tVJnR7zEkZ9kjSSPcpHWknspsHeuAPXqtLoHvqWkRVEARaOgkPBmzNCZCfJ4Mc8pRN99kKQ==",
+      "version": "1.50.6",
+      "resolved": "https://registry.npmjs.org/es-dev-server/-/es-dev-server-1.50.6.tgz",
+      "integrity": "sha512-9MZziicHR3pqIKvRYFe6al67RMsdEXiXvIzbMYZ6h2ATtr0P0IWpa7hyplK7rfIiF9zkrss6JPfrk+jVusKZSg==",
       "dev": true,
       "requires": {
         "@babel/core": "^7.9.0",
@@ -9556,6 +9556,7 @@
         "@open-wc/building-utils": "^2.18.0",
         "@rollup/plugin-node-resolve": "^7.1.1",
         "@rollup/pluginutils": "^3.0.0",
+        "@types/babel__core": "^7.1.3",
         "@types/browserslist": "^4.8.0",
         "@types/browserslist-useragent": "^3.0.0",
         "@types/caniuse-api": "^3.0.0",
@@ -9594,8 +9595,9 @@
         "open": "^7.0.3",
         "parse5": "^5.1.1",
         "path-is-inside": "^1.0.2",
-        "polyfills-loader": "^1.6.0",
+        "polyfills-loader": "^1.6.1",
         "portfinder": "^1.0.21",
+        "rollup": "^2.7.2",
         "strip-ansi": "^5.2.0",
         "systemjs": "^6.3.1",
         "tslib": "^1.11.1",
@@ -20101,9 +20103,9 @@
       }
     },
     "polyfills-loader": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/polyfills-loader/-/polyfills-loader-1.6.0.tgz",
-      "integrity": "sha512-pn2FLDnYc+lS4j8nrRr3B/b3JmtNNOV446vpmNftllWYXBOWCaNjI8J9nDCW7tTl32Iu+S9i9ms6QYAf9fFfsg==",
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/polyfills-loader/-/polyfills-loader-1.6.1.tgz",
+      "integrity": "sha512-GK3jZGLy9nApfRYfHrrO4RYkBkpjiXUVWVdp169g4Y8HV+ZazrGQX46tNpbwP0dtrgHgADyJvZYPfdFuooHy5Q==",
       "dev": true,
       "requires": {
         "@babel/core": "^7.9.0",
diff --git a/package.json b/package.json
index 9ab24518ae..2982e1db23 100644
--- a/package.json
+++ b/package.json
@@ -79,7 +79,7 @@
     "concurrently": "^5.2.0",
     "cross-env": "^7.0.2",
     "deepmerge": "^4.2.2",
-    "es-dev-server": "^1.50.5",
+    "es-dev-server": "^1.50.6",
     "eslint": "^7.0.0",
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^6.11.0",