diff --git a/package.json b/package.json
index 7911ef7..2a125b2 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "description": "A path-based cache for quick lookups in nested data structures.",
     "devDependencies": {
         "@types/chai": "^4.0.4",
-        "@types/lolex": "^1.5.32",
+        "@types/lolex": "^2.1.1",
         "@types/mocha": "^2.2.44",
         "@types/sinon": "^4.0.0",
         "@types/sinon-chai": "^2.7.29",