diff --git a/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs b/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs
index 396ad20eb..1e869d666 100644
--- a/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs
+++ b/src/TensorFlowNET.Keras/Saving/KerasObjectLoader.cs
@@ -174,7 +174,7 @@ public void del_tracking()
                 }
                 if(node is Functional functional)
                 {
-                    foreach(var name in functional.UnconditionalDependencyNames.Keys)
+                    foreach(var name in functional.UnconditionalDependencyNames.Keys.ToArray())
                     {
                         if(Regex.Match(name, @"^layer(_with_weights)?-[\d+]").Success)
                         {