diff --git a/package-lock.json b/package-lock.json
index e8f166a3..abc4b9e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4442,9 +4442,9 @@
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@@ -5583,15 +5595,6 @@
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@@ -11965,12 +11971,6 @@
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@@ -12968,9 +12909,9 @@
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@@ -13005,15 +12946,37 @@
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+          "requires": {
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+          "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.6.2.tgz",
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+          "requires": {
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+            "object-assign": "^4.1.1"
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@@ -13687,16 +13650,6 @@
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-      "resolved": "https://registry.npmjs.org/resolve-dir/-/resolve-dir-1.0.1.tgz",
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@@ -14801,17 +14754,34 @@
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-      "resolved": "https://registry.npmjs.org/sockjs-client/-/sockjs-client-1.1.5.tgz",
-      "integrity": "sha1-G7fA9yIsQPQq3xT0RCy9Eml3GoM=",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/sockjs-client/-/sockjs-client-1.3.0.tgz",
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-        "debug": "^2.6.6",
-        "eventsource": "0.1.6",
-        "faye-websocket": "~0.11.0",
-        "inherits": "^2.0.1",
+        "debug": "^3.2.5",
+        "eventsource": "^1.0.7",
+        "faye-websocket": "~0.11.1",
+        "inherits": "^2.0.3",
         "json3": "^3.3.2",
-        "url-parse": "^1.1.8"
+        "url-parse": "^1.4.3"
+      },
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+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
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+          "dev": true,
+          "requires": {
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+          }
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+        "ms": {
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+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
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+          "dev": true
+        }
       }
     },
     "source-list-map": {
@@ -16662,9 +16632,9 @@
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-      "resolved": "https://registry.npmjs.org/warning/-/warning-4.0.2.tgz",
-      "integrity": "sha512-wbTp09q/9C+jJn4KKJfJfoS6VleK/Dti0yqWSm6KMvJ4MRCXFQNapHuJXutJIrWV0Cf4AhTdeIe4qdKHR1+Hug==",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/warning/-/warning-4.0.3.tgz",
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@@ -16894,35 +16864,12 @@
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-          "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-1.0.7.tgz",
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-          "dev": true,
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-        "sockjs-client": {
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-          "resolved": "https://registry.npmjs.org/sockjs-client/-/sockjs-client-1.3.0.tgz",
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-          "dev": true,
-          "requires": {
-            "debug": "^3.2.5",
-            "eventsource": "^1.0.7",
-            "faye-websocket": "~0.11.1",
-            "inherits": "^2.0.3",
-            "json3": "^3.3.2",
-            "url-parse": "^1.4.3"
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diff --git a/package.json b/package.json
index 621a0aec..4b582b11 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   "homepage": "https://github.com/dfee/rbx#readme",
   "dependencies": {
     "classnames": "^2.2.6",
-    "prop-types": "^15.6.2"
+    "prop-types": "^15.7.1"
   },
   "peerDependencies": {
     "react": "^16.8.1",
@@ -64,6 +64,7 @@
     "docz-theme-default": "^0.13.7",
     "enzyme": "3.8.0",
     "enzyme-adapter-react-16": "1.9.1",
+    "fork-ts-checker-webpack-plugin": "^0.5.2",
     "husky": "^1.3.1",
     "jest": "23.6.0",
     "jsdom": "13.1.0",