diff --git a/docs/Project.toml b/docs/Project.toml
index 617c85a1c..0951be955 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -61,7 +61,7 @@ IncompleteLU = "0.2"
 JLD2 = "0.4, 0.5.1"
 ModelingToolkit = "9"
 ODEProblemLibrary = "0.1"
-Optimization = "3"
+Optimization = "3, 4"
 OptimizationNLopt = "0.2, 0.3"
 OrdinaryDiffEq = "6.76"
 OrdinaryDiffEqCore = "1"