diff --git a/javascript/resistor-color-duo/package-lock.json b/javascript/resistor-color-duo/package-lock.json
index c41ca23..e1ba036 100644
--- a/javascript/resistor-color-duo/package-lock.json
+++ b/javascript/resistor-color-duo/package-lock.json
@@ -1532,14 +1532,36 @@
       }
     },
     "browserslist": {
-      "version": "4.6.2",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.6.2.tgz",
-      "integrity": "sha512-2neU/V0giQy9h3XMPwLhEY3+Ao0uHSwHvU8Q1Ea6AgLVL1sXbX3dzPrJ8NWe5Hi4PoTkCYXOtVR9rfRLI0J/8Q==",
+      "version": "4.16.6",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.16.6.tgz",
+      "integrity": "sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==",
       "dev": true,
       "requires": {
-        "caniuse-lite": "^1.0.30000974",
-        "electron-to-chromium": "^1.3.150",
-        "node-releases": "^1.1.23"
+        "caniuse-lite": "^1.0.30001219",
+        "colorette": "^1.2.2",
+        "electron-to-chromium": "^1.3.723",
+        "escalade": "^3.1.1",
+        "node-releases": "^1.1.71"
+      },
+      "dependencies": {
+        "caniuse-lite": {
+          "version": "1.0.30001228",
+          "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz",
+          "integrity": "sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==",
+          "dev": true
+        },
+        "electron-to-chromium": {
+          "version": "1.3.737",
+          "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.737.tgz",
+          "integrity": "sha512-P/B84AgUSQXaum7a8m11HUsYL8tj9h/Pt5f7Hg7Ty6bm5DxlFq+e5+ouHUoNQMsKDJ7u4yGfI8mOErCmSH9wyg==",
+          "dev": true
+        },
+        "node-releases": {
+          "version": "1.1.72",
+          "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.72.tgz",
+          "integrity": "sha512-LLUo+PpH3dU6XizX3iVoubUNheF/owjXCZZ5yACDxNnPtgFuludV1ZL3ayK1kVep42Rmm0+R9/Y60NQbZ2bifw==",
+          "dev": true
+        }
       }
     },
     "bser": {
@@ -1586,12 +1608,6 @@
       "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
       "dev": true
     },
-    "caniuse-lite": {
-      "version": "1.0.30000974",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30000974.tgz",
-      "integrity": "sha512-xc3rkNS/Zc3CmpMKuczWEdY2sZgx09BkAxfvkxlAEBTqcMHeL8QnPqhKse+5sRTi3nrw2pJwToD2WvKn1Uhvww==",
-      "dev": true
-    },
     "capture-exit": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/capture-exit/-/capture-exit-2.0.0.tgz",
@@ -1737,6 +1753,12 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
+    "colorette": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.2.2.tgz",
+      "integrity": "sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==",
+      "dev": true
+    },
     "combined-stream": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
@@ -2000,12 +2022,6 @@
         "safer-buffer": "^2.1.0"
       }
     },
-    "electron-to-chromium": {
-      "version": "1.3.152",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.152.tgz",
-      "integrity": "sha512-Ah10cGMWIXYD8aUTH2Y7lGRhaOFQLyWuxvXmCPCZCbUIGJ4swnNmT6P4aA8RTgUmNw9kmcDL6SoU8TZC4YuZGg==",
-      "dev": true
-    },
     "emoji-regex": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
@@ -2055,6 +2071,12 @@
         "is-symbol": "^1.0.2"
       }
     },
+    "escalade": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
+      "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
+      "dev": true
+    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -4827,15 +4849,6 @@
         "which": "^1.3.0"
       }
     },
-    "node-releases": {
-      "version": "1.1.23",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.23.tgz",
-      "integrity": "sha512-uq1iL79YjfYC0WXoHbC/z28q/9pOl8kSHaXdWmAAc8No+bDwqkZbzIJz55g/MUsPgSGm9LZ7QSUbzTcH5tz47w==",
-      "dev": true,
-      "requires": {
-        "semver": "^5.3.0"
-      }
-    },
     "normalize-package-data": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.5.0.tgz",