diff --git a/Project.toml b/Project.toml
index ee6d559..cbe4544 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "OrderedCollections"
 uuid = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
-version = "1.6.4-DEV"
+version = "2.0.0-DEV"
 
 [compat]
 julia = "1.6"