diff --git a/js/package-lock.json b/js/package-lock.json
index ac65a9c8ef..4c2709bf5b 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -3869,7 +3869,7 @@
         "from2-array": "0.0.4",
         "map-limit": "0.0.1",
         "multipipe": "0.3.1",
-        "read-package-json": "2.0.12",
+        "read-package-json": "2.0.13",
         "resolve": "1.4.0"
       }
     },
@@ -4145,9 +4145,9 @@
       "dev": true
     },
     "json-parse-better-errors": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.1.tgz",
-      "integrity": "sha512-xyQpxeWWMKyJps9CuGJYeng6ssI5bpqS9ltQpdVQ90t4ql6NdnxFKh95JcRt2cun/DjMVNrdjniLPuMA69xmCw==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz",
+      "integrity": "sha512-mrqyZKfX5EhL7hvqcV6WG1yYjnjeuYDzDhhcAAUrq8Po85NBQBJP+ZDUT75qZQ98IkUoBqdkExkukOU7Ts2wrw==",
       "dev": true
     },
     "json-parser": {
@@ -4757,7 +4757,7 @@
           "integrity": "sha1-ixLauHjA1p4+eJEFFmKjL8a93ME=",
           "dev": true,
           "requires": {
-            "readable-stream": "2.3.4"
+            "readable-stream": "2.3.6"
           }
         },
         "isarray": {
@@ -4767,9 +4767,9 @@
           "dev": true
         },
         "readable-stream": {
-          "version": "2.3.4",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.4.tgz",
-          "integrity": "sha512-vuYxeWYM+fde14+rajzqgeohAI7YoJcHE7kXDAc4Nk0EbuKnJfqtY9YtRkLo/tqkuF7MsBQRhPnPeyjYITp3ZQ==",
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
           "dev": true,
           "requires": {
             "core-util-is": "1.0.2",
@@ -4777,14 +4777,14 @@
             "isarray": "1.0.0",
             "process-nextick-args": "2.0.0",
             "safe-buffer": "5.1.1",
-            "string_decoder": "1.0.3",
+            "string_decoder": "1.1.1",
             "util-deprecate": "1.0.2"
           }
         },
         "string_decoder": {
-          "version": "1.0.3",
-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-          "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
           "dev": true,
           "requires": {
             "safe-buffer": "5.1.1"
@@ -5660,14 +5660,14 @@
       }
     },
     "read-package-json": {
-      "version": "2.0.12",
-      "resolved": "https://registry.npmjs.org/read-package-json/-/read-package-json-2.0.12.tgz",
-      "integrity": "sha512-m7/I0+tP6D34EVvSlzCtuVA4D/dHL6OpLcn2e4XVP5X57pCKGUy1JjRSBVKHWpB+vUU91sL85h84qX0MdXzBSw==",
+      "version": "2.0.13",
+      "resolved": "https://registry.npmjs.org/read-package-json/-/read-package-json-2.0.13.tgz",
+      "integrity": "sha512-/1dZ7TRZvGrYqE0UAfN6qQb5GYBsNcqS1C0tNK601CFOJmtHI7NIGXwetEPU/OtoFHZL3hDxm4rolFFVE9Bnmg==",
       "dev": true,
       "requires": {
         "glob": "7.1.2",
         "graceful-fs": "4.1.11",
-        "json-parse-better-errors": "1.0.1",
+        "json-parse-better-errors": "1.0.2",
         "normalize-package-data": "2.4.0",
         "slash": "1.0.0"
       }
diff --git a/js/package.json b/js/package.json
index 613c9544df..feff511d8c 100644
--- a/js/package.json
+++ b/js/package.json
@@ -20,20 +20,18 @@
   ],
   "scripts": {
     "clean": "rimraf dist/ && rimraf ../plotlywidget/static",
-    "build": "webpack",
-    "prepublish": "npm run clean && npm run build",
+    "prepublish": "webpack",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "devDependencies": {
-    "json-loader": "^0.5.4",
-    "webpack": "^3.5.5",
+    "webpack": "^3.10.0",
     "rimraf": "^2.6.1",
     "ify-loader": "^1.1.0"
   },
   "dependencies": {
     "plotly.js": "^1.35.2",
-    "@jupyter-widgets/base": "^1.0.4",
-    "lodash": "^4.0"
+    "@jupyter-widgets/base": "^1.0.0",
+    "lodash": "^4.17.4"
   },
   "jupyterlab": {
     "extension": "src/jupyterlab-plugin"
diff --git a/js/webpack.config.js b/js/webpack.config.js
index 7503110901..167ed1335a 100644
--- a/js/webpack.config.js
+++ b/js/webpack.config.js
@@ -5,8 +5,7 @@ var version = require('./package.json').version;
 // stored in a separate local variable.
 var rules = [
     { test: /\.css$/, use: ['style-loader', 'css-loader']},
-    { test: /\.json$/, use: 'json-loader' },
-    { test: /\.js$/, use: 'ify-loader' }
+    { test: /\.js$/, use: ['ify-loader']}
 ];