diff --git a/package.json b/package.json
index 9fa5012..bc16be6 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "bip": "^2.0.1"
   },
   "devDependencies": {
-    "chai": "4.3.3",
+    "chai": "4.3.4",
     "codeclimate-test-reporter": "0.5.1",
     "coffee-coverage": "2.0.1",
     "coffee-script": "1.12.7",
diff --git a/yarn.lock b/yarn.lock
index a272817..378ec2c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -183,10 +183,10 @@ center-align@^0.1.1:
     align-text "^0.1.3"
     lazy-cache "^1.0.3"
 
-chai@4.3.3:
-  version "4.3.3"
-  resolved "https://registry.yarnpkg.com/chai/-/chai-4.3.3.tgz#f2b2ad9736999d07a7ff95cf1e7086c43a76f72d"
-  integrity sha512-MPSLOZwxxnA0DhLE84klnGPojWFK5KuhP7/j5dTsxpr2S3XlkqJP5WbyYl1gCTWvG2Z5N+HD4F472WsbEZL6Pw==
+chai@4.3.4:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/chai/-/chai-4.3.4.tgz#b55e655b31e1eac7099be4c08c21964fce2e6c49"
+  integrity sha512-yS5H68VYOCtN1cjfwumDSuzn/9c+yza4f3reKXlE5rUg7SFcCEy90gJvydNgOYtblyf4Zi6jIWRnXOgErta0KA==
   dependencies:
     assertion-error "^1.1.0"
     check-error "^1.0.2"