diff --git a/package-lock.json b/package-lock.json
index 8832d7f63..6741814b5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -867,14 +867,17 @@
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-      "resolved": "https://registry.npmjs.org/chai/-/chai-3.5.0.tgz",
-      "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
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+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.1.2.tgz",
+      "integrity": "sha1-D2RYS6ZC8PKs4oBiefTwbKI61zw=",
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-        "deep-eql": "0.1.3",
-        "type-detect": "1.0.0"
+        "check-error": "1.0.2",
+        "deep-eql": "3.0.1",
+        "get-func-name": "2.0.0",
+        "pathval": "1.1.0",
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@@ -1221,20 +1224,12 @@
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-      "integrity": "sha1-71WKyrjeJSBs1xOQbXTlaTDrafI=",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
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-          "integrity": "sha1-C6XsKohWQORw6k6FBZcZANrFiCI=",
-          "dev": true
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@@ -1637,14 +1632,9 @@
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-        "node-pre-gyp": "0.6.36"
+        "nan": "2.6.2"
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@@ -1653,10 +1643,6 @@
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@@ -1671,10 +1657,6 @@
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@@ -1691,27 +1673,6 @@
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@@ -1731,17 +1692,6 @@
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@@ -1754,26 +1704,6 @@
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@@ -1786,10 +1716,6 @@
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@@ -1807,10 +1733,6 @@
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@@ -1825,20 +1747,6 @@
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@@ -1882,52 +1790,10 @@
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@@ -1940,17 +1806,6 @@
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@@ -1970,20 +1825,6 @@
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@@ -1994,50 +1835,18 @@
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@@ -2046,29 +1855,6 @@
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@@ -2081,10 +1867,6 @@
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@@ -2137,88 +1919,31 @@
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-          "bundled": true,
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@@ -2231,22 +1956,11 @@
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@@ -2299,6 +2013,12 @@
       "integrity": "sha1-9wLmMSfn4jHBYKgMFVSstw1QR+U=",
       "dev": true
     },
+    "get-func-name": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.0.tgz",
+      "integrity": "sha1-6td0q+5y4gQJQzoGY2YCPdaIekE=",
+      "dev": true
+    },
     "get-stdin": {
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       "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-4.0.1.tgz",
@@ -3701,6 +3421,12 @@
         "pinkie-promise": "2.0.1"
       }
     },
+    "pathval": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.0.tgz",
+      "integrity": "sha1-uULm1L3mUwBe9rcTYd74cn0GReA=",
+      "dev": true
+    },
     "pbkdf2": {
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       "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.12.tgz",
@@ -4628,9 +4354,9 @@
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-      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-1.0.0.tgz",
-      "integrity": "sha1-diIXzAbbJY7EiQihKY6LlRIejqI=",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.3.tgz",
+      "integrity": "sha1-Dj8mcLRAmbC0bChNE2p+9Jx0wuo=",
       "dev": true
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     "typedarray": {
diff --git a/package.json b/package.json
index 10bd3ccaf..dcdcd6f53 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "babel-plugin-transform-es2015-modules-commonjs": "^6.18.0",
     "babel-preset-react": "^6.16.0",
     "browserify": "^14.3.0",
-    "chai": "^3.5.0",
+    "chai": "^4.1.2",
     "chai-as-promised": "^6.0.0",
     "chokidar": "^1.7.0",
     "co-mocha": "^1.2.0",