diff --git a/package.json b/package.json
index fd9097b..ae551f6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "mem",
-	"version": "3.0.1",
+	"version": "4.0.0",
 	"description": "Memoize functions - An optimization used to speed up consecutive function calls by caching the result of calls with identical input",
 	"license": "MIT",
 	"repository": "sindresorhus/mem",