diff --git a/package.json b/package.json
index 1e0b2ae..26e344e 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "babel-core": "^6.26.0",
     "babel-plugin-transform-object-assign": "^6.22.0",
     "babel-preset-es2015-rollup": "^3.0.0",
-    "chai": "^4.1.2",
+    "chai": "^4.3.0",
     "eslint": "^4.12.1",
     "eslint-config-spreetail": "^3.0.0",
     "karma": "^3.0.0",