diff --git a/Project.toml b/Project.toml
index f43257e..d9d892a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "QueryOperators"
 uuid = "2aef5ad7-51ca-5a8f-8e88-e75cf067b44b"
-version = "0.9.3"
+version = "0.9.4-DEV"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"