diff --git a/package.json b/package.json
index 65de4cf..8013197 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "@babel/preset-env": "7.7.1",
     "@babel/register": "7.7.0",
     "babel-eslint": "10.0.3",
-    "chai": "4.2.0",
+    "chai": "4.3.9",
     "chai-jest-snapshot": "2.0.0",
     "eslint": "6.5.1",
     "eslint-plugin-prettier": "3.1.1",
diff --git a/yarn.lock b/yarn.lock
index 339c432..b91b111 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1141,16 +1141,17 @@ chai-jest-snapshot@2.0.0:
     jest-snapshot "21.2.1"
     lodash.values "^4.3.0"
 
-chai@4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/chai/-/chai-4.2.0.tgz#760aa72cf20e3795e84b12877ce0e83737aa29e5"
-  integrity sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==
+chai@4.3.9:
+  version "4.3.9"
+  resolved "https://registry.yarnpkg.com/chai/-/chai-4.3.9.tgz#c934ab542b11cc933a963617f0f890274c66c042"
+  integrity sha512-tH8vhfA1CfuYMkALXj+wmZcqiwqOfshU9Gry+NYiiLqIddrobkBhALv6XD4yDz68qapphYI4vSaqhqAdThCAAA==
   dependencies:
     assertion-error "^1.1.0"
-    check-error "^1.0.2"
-    deep-eql "^3.0.1"
+    check-error "^1.0.3"
+    deep-eql "^4.1.2"
     get-func-name "^2.0.0"
-    pathval "^1.1.0"
+    loupe "^2.3.1"
+    pathval "^1.1.1"
     type-detect "^4.0.5"
 
 chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.4.2:
@@ -1167,10 +1168,12 @@ chardet@^0.7.0:
   resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
   integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
 
-check-error@^1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/check-error/-/check-error-1.0.2.tgz#574d312edd88bb5dd8912e9286dd6c0aed4aac82"
-  integrity sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=
+check-error@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/check-error/-/check-error-1.0.3.tgz#a6502e4312a7ee969f646e83bb3ddd56281bd694"
+  integrity sha512-iKEoDYaRmd1mxM90a2OEfWhjsjPpYPuQ+lMYsoxB126+t8fw7ySEO48nmDg5COTjxDI65/Y2OWpeEHk3ZOe8zg==
+  dependencies:
+    get-func-name "^2.0.2"
 
 chokidar@^2.1.8:
   version "2.1.8"
@@ -1376,10 +1379,10 @@ decode-uri-component@^0.2.0:
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
   integrity sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=
 
-deep-eql@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-3.0.1.tgz#dfc9404400ad1c8fe023e7da1df1c147c4b444df"
-  integrity sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==
+deep-eql@^4.1.2:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-4.1.3.tgz#7c7775513092f7df98d8df9996dd085eb668cc6d"
+  integrity sha512-WaEtAOpRA1MQ0eohqZjpGD8zdI0Ovsm8mmFhaDN8dvDZzyoUMcYDnf5Y6iu7HTXxf8JDS23qWa4a+hKCDyOPzw==
   dependencies:
     type-detect "^4.0.0"
 
@@ -1843,6 +1846,11 @@ get-func-name@^2.0.0:
   resolved "https://registry.yarnpkg.com/get-func-name/-/get-func-name-2.0.0.tgz#ead774abee72e20409433a066366023dd6887a41"
   integrity sha1-6td0q+5y4gQJQzoGY2YCPdaIekE=
 
+get-func-name@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/get-func-name/-/get-func-name-2.0.2.tgz#0d7cf20cd13fda808669ffa88f4ffc7a3943fc41"
+  integrity sha512-8vXOvuE167CtIc3OyItco7N/dpRtBbYOsPsXCz7X/PMnlGjYjSGuZJgM1Y7mmew7BKf9BqvLX2tnOVy1BBUsxQ==
+
 get-stream@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-4.1.0.tgz#c1b255575f3dc21d59bfc79cd3d2b46b1c3a54b5"
@@ -2486,6 +2494,13 @@ loose-envify@^1.0.0:
   dependencies:
     js-tokens "^3.0.0 || ^4.0.0"
 
+loupe@^2.3.1:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/loupe/-/loupe-2.3.6.tgz#76e4af498103c532d1ecc9be102036a21f787b53"
+  integrity sha512-RaPMZKiMy8/JruncMU5Bt6na1eftNoo++R4Y+N2FrxkDVTrGvcyzFTsaGif4QTeKESheMGegbhw6iUAq+5A8zA==
+  dependencies:
+    get-func-name "^2.0.0"
+
 lru-cache@^4.0.1:
   version "4.1.5"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.5.tgz#8bbe50ea85bed59bc9e33dcab8235ee9bcf443cd"
@@ -3058,10 +3073,10 @@ path-type@^3.0.0:
   dependencies:
     pify "^3.0.0"
 
-pathval@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/pathval/-/pathval-1.1.0.tgz#b942e6d4bde653005ef6b71361def8727d0645e0"
-  integrity sha1-uULm1L3mUwBe9rcTYd74cn0GReA=
+pathval@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/pathval/-/pathval-1.1.1.tgz#8534e77a77ce7ac5a2512ea21e0fdb8fcf6c3d8d"
+  integrity sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==
 
 pify@^3.0.0:
   version "3.0.0"