diff --git a/package.json b/package.json
index 2d447cd..235ff0b 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "concurrently": "^4.1.0",
     "glob": "^7.1.3",
     "istanbul": "^0.4.5",
-    "lolex": "^4.0.1",
+    "lolex": "^5.1.1",
     "mkdirp": "^0.5.1",
     "mocha": "^6.1.3",
     "mocha-headless-chrome": "^2.0.2",