diff --git a/package.json b/package.json
index 8f4ed45f..dc1979fb 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "babel-preset-flow": "6.23.0",
     "babel-preset-stage-1": "6.24.1",
     "babel-register": "6.26.0",
-    "chai": "3.5.0",
+    "chai": "6.2.2",
     "eslint": "4.19.1",
     "eslint-config-airbnb": "18.2.1",
     "eslint-plugin-import": "2.32.0",
diff --git a/yarn.lock b/yarn.lock
index 117ff12a..857e76a6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -356,10 +356,6 @@ assert-plus@1.0.0, assert-plus@^1.0.0:
   resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-1.0.0.tgz#f12e0f3c5d77b0b1cdd9146942e4e96c1e4dd525"
   integrity sha512-NfJ4UzBCcQGLDlQq7nHxH+tv3kyZ0hHQqF5BO6J7tNJeP5do1llPr8dZ8zHonfhAu0PHAdMkSo+8o0wxg9lZWw==
 
-assertion-error@^1.0.1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.2.tgz#13ca515d86206da0bac66e834dd397d87581094c"
-
 ast-types-flow@0.0.7:
   version "0.0.7"
   resolved "https://registry.yarnpkg.com/ast-types-flow/-/ast-types-flow-0.0.7.tgz#f70b735c6bca1a5c9c22d982c3e39e7feba3bdad"
@@ -1322,13 +1318,10 @@ center-align@^0.1.1:
     align-text "^0.1.3"
     lazy-cache "^1.0.3"
 
-chai@3.5.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/chai/-/chai-3.5.0.tgz#4d02637b067fe958bdbfdd3a40ec56fef7373247"
-  dependencies:
-    assertion-error "^1.0.1"
-    deep-eql "^0.1.3"
-    type-detect "^1.0.0"
+chai@6.2.2:
+  version "6.2.2"
+  resolved "https://registry.yarnpkg.com/chai/-/chai-6.2.2.tgz#ae41b52c9aca87734505362717f3255facda360e"
+  integrity sha512-NUPRluOfOiTKBKvWPtSD4PhFvWCqOi0BGStNWs57X9js7XGTprSmFoz5F0tWhR4WPjNeR9jXqdC7/UpSJTnlRg==
 
 chalk@^1.1.0, chalk@^1.1.3:
   version "1.1.3"
@@ -1598,12 +1591,6 @@ decamelize@^1.0.0, decamelize@^1.1.1:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
-deep-eql@^0.1.3:
-  version "0.1.3"
-  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-0.1.3.tgz#ef558acab8de25206cd713906d74e56930eb69f2"
-  dependencies:
-    type-detect "0.1.1"
-
 deep-extend@~0.4.0:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.1.tgz#efe4113d08085f4e6f9687759810f807469e2253"
@@ -5168,14 +5155,6 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-type-detect@0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-0.1.1.tgz#0ba5ec2a885640e470ea4e8505971900dac58822"
-
-type-detect@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-1.0.0.tgz#762217cc06db258ec48908a1298e8b95121e8ea2"
-
 type-detect@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.3.tgz#0e3f2670b44099b0b46c284d136a7ef49c74c2ea"