diff --git a/package.json b/package.json
index 84cc6ab..2e41e6e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "p-limit",
-	"version": "3.1.0",
+	"version": "4.0.0",
 	"description": "Run multiple promise-returning & async functions with limited concurrency",
 	"license": "MIT",
 	"repository": "sindresorhus/p-limit",