diff --git a/Project.toml b/Project.toml
index 78a844e..2106af8 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Ipopt"
 uuid = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
 repo = "https://github.com/jump-dev/Ipopt.jl.git"
-version = "1.6.5"
+version = "1.6.6"
 
 [deps]
 Ipopt_jll = "9cc047cb-c261-5740-88fc-0cf96f7bdcc7"