diff --git a/package.json b/package.json
index ad78d3b..f5aa906 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "lcid",
-	"version": "3.1.1",
+	"version": "4.0.0",
 	"description": "Mapping between standard locale identifiers and Windows locale identifiers (LCID)",
 	"license": "MIT",
 	"repository": "sindresorhus/lcid",