diff --git a/src/cleveragents/domain/models/core/resource_type.py b/src/cleveragents/domain/models/core/resource_type.py
index 874b9bda..8c634749 100644
--- a/src/cleveragents/domain/models/core/resource_type.py
+++ b/src/cleveragents/domain/models/core/resource_type.py
@@ -482,12 +482,12 @@ class ResourceTypeSpec(BaseModel):
         if self.child_types:
             result["child_types"] = list(self.child_types)
 
-        result["capabilities"] = self.capabilities
+        result["capabilities"] = dict(self.capabilities)
 
         if self.auto_discovery is not None:
-            result["auto_discovery"] = self.auto_discovery
+            result["auto_discovery"] = dict(self.auto_discovery)
         if self.equivalence is not None:
-            result["equivalence"] = self.equivalence
+            result["equivalence"] = dict(self.equivalence)
         if self.handler is not None:
             result["handler"] = self.handler