diff --git a/Project.toml b/Project.toml
index a65ce28c..ae2af1fb 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,6 +18,7 @@ Optim = "0.19, 0.20, 0.21, 0.22, 1.0"
 RecipesBase = "0.8, 1.0"
 RecursiveArrayTools = "2"
 Reexport = "0.2, 1.0"
+RegularizationTools = "0.5"
 Symbolics = "4"
 julia = "1.6"