diff --git a/Project.toml b/Project.toml
index 56c71534..d0c24611 100644
--- a/Project.toml
+++ b/Project.toml
@@ -76,6 +76,7 @@ MCMCChains = "3.0, 4.0"
 Measurements = "2.1"
 ModelingToolkit = "0.9, 0.10, 1.0, 2.0, 3.0"
 NLsolve = "4.2"
+NeuralNetDiffEq = "1.5"
 Optim = "0.19, 0.20, 0.21"
 OrdinaryDiffEq = "5.23"
 ParameterizedFunctions = "4.2, 5.0"