diff --git a/docs/Project.toml b/docs/Project.toml
index 078df7d696..4029f6f293 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -30,7 +30,7 @@ DynamicQuantities = "^0.11.2, 0.12, 1"
 ModelingToolkit = "8.33, 9"
 NonlinearSolve = "3"
 Optim = "1.7"
-Optimization = "3.9"
+Optimization = "3.9, 4"
 OptimizationOptimJL = "0.1"
 OrdinaryDiffEq = "6.31"
 Plots = "1.36"