diff --git a/package.json b/package.json
index afd8bc7..0e89f43 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "gulp-sourcemaps": "^2.2.0",
     "gulp-typescript": "^3.1.6",
     "merge2": "^1.0.2",
-    "mocha": "^3.1.0",
+    "mocha": "^6.1.1",
     "remap-istanbul": "^0.10.0",
     "rollup-plugin-node-resolve": "^3.0.0",
     "typescript": "^2.2.1"