diff --git a/Project.toml b/Project.toml
index d55fcd7..f43b505 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "HyperDualNumbers"
 uuid = "50ceba7f-c3ee-5a84-a6e8-3ad40456ec97"
 authors = ["Rob J Goedman <goedman@icloud.com>"]
-version = "4.0.5"
+version = "4.0.6"
 
 [deps]
 Calculus = "49dc2e85-a5d0-5ad3-a950-438e2897f1b9"