diff --git a/Project.toml b/Project.toml
index 93f5059d8..9d820a0a3 100644
--- a/Project.toml
+++ b/Project.toml
@@ -87,7 +87,7 @@ MethodOfLines = "0.11.6"
 ModelingToolkit = "9.46"
 MonteCarloMeasurements = "1.1"
 NeuralOperators = "0.5"
-Optimisers = "0.3.3"
+Optimisers = "0.3.3, 0.4"
 Optimization = "4"
 OptimizationOptimJL = "0.4"
 OptimizationOptimisers = "0.3"