diff --git a/package-lock.json b/package-lock.json
index fa2f40f..51c1391 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2219,7 +2219,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2634,7 +2635,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2690,6 +2692,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -2733,12 +2736,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -3702,9 +3707,9 @@
       }
     },
     "lolex": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/lolex/-/lolex-4.0.1.tgz",
-      "integrity": "sha512-UHuOBZ5jjsKuzbB/gRNNW8Vg8f00Emgskdq2kvZxgBJCS0aqquAuXai/SkWORlKeZEiNQWZjFZOqIUcH9LqKCw==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/lolex/-/lolex-5.0.0.tgz",
+      "integrity": "sha512-79Le9AHAH4tg76f/Zti7S9TzUZmuKFYOWLAXUj+K5g8ZIK7d0xw2i6aB9FNIkJbCGTQ9CKxm3IQjqu7YR6+oMA==",
       "dev": true
     },
     "lowercase-keys": {
diff --git a/package.json b/package.json
index 4a4d1cb..87f5465 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": "^5.0.0",
     "mkdirp": "^0.5.1",
     "mocha": "^6.1.3",
     "mocha-headless-chrome": "^2.0.2",