diff --git a/package-lock.json b/package-lock.json
index fa2f40f..4301022 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -109,9 +109,9 @@
       "dev": true
     },
     "@types/lolex": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/@types/lolex/-/lolex-3.1.1.tgz",
-      "integrity": "sha512-NU2qVtKxbt4IBvjEOW1QeUnV6KGUF6hpgJyvwZt3JrXe2qmwQF0+BiazQw+iFy9qL5ie+QHOxTzXkcvJUEh76g==",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/@types/lolex/-/lolex-5.1.0.tgz",
+      "integrity": "sha512-hCQ2dOEQUw1LwofdIpMMGGqENd5p5ANzvcTe1nXTjcQL84r7tcLXFJlBgi0Ggz0f7BLmE2epf0C5Q07iq2gV0g==",
       "dev": true
     },
     "@types/marked": {
@@ -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
         }
       }
     },
diff --git a/package.json b/package.json
index 4a4d1cb..bc56755 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   "devDependencies": {
     "@types/chai": "^4.1.7",
     "@types/lodash": "^4.14.123",
-    "@types/lolex": "^3.1.1",
+    "@types/lolex": "^5.1.0",
     "@types/mocha": "^5.2.6",
     "@types/sinon": "^7.0.11",
     "@types/sinon-chai": "^3.2.2",