diff --git a/package.json b/package.json
index 8950a3f..7ee5c5a 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "concurrently": "^4.1.0",
     "glob": "^7.1.3",
     "istanbul": "^0.4.5",
-    "lolex": "^4.0.1",
+    "lolex": "^5.1.0",
     "mkdirp": "^0.5.1",
     "mocha": "^6.1.3",
     "mocha-headless-chrome": "^2.0.2",