diff --git a/Runtime/Scripts/Core/Synapse.cs b/Runtime/Scripts/Core/Synapse.cs
index 0cddc88..e34474c 100644
--- a/Runtime/Scripts/Core/Synapse.cs
+++ b/Runtime/Scripts/Core/Synapse.cs
@@ -108,11 +108,13 @@ namespace NanoBrain {
             public string clusterName;
             public string neuronName;
             public float weight;
+            public bool trainable;
 
         public SynapseData(Synapse synapse) {
             this.clusterName = synapse.neuron.parent.name;
             this.neuronName = synapse.neuron.name;
             this.weight = synapse.weight;
+            this.trainable = synapse.trainable;
         }
     }
 }
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