diff --git a/Project.toml b/Project.toml
index b459dfccd..eb13e0d7f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -140,7 +140,7 @@ NamedArrays = "0.9.3, 0.10"
 NestedSamplers = "0.8"
 OneTwoMany = "0.1.2"
 Optim = "1.12"
-Optimization = "3, 4"
+Optimization = "3, 4, 5"
 PDMats = "0.9, 0.10, 0.11"
 ParallelProcessingTools = "0.4"
 Parameters = "0.12, 0.13"