diff --git a/packages/eth_rpc/src/eth_rpc/contract/func_signature.py b/packages/eth_rpc/src/eth_rpc/contract/func_signature.py
index ec3f440..f4dd5ac 100644
--- a/packages/eth_rpc/src/eth_rpc/contract/func_signature.py
+++ b/packages/eth_rpc/src/eth_rpc/contract/func_signature.py
@@ -26,6 +26,8 @@
 def convert_nested_dict(d: Any) -> Any:
     if isinstance(d, dict):
         return tuple(convert_nested_dict(v) for v in d.values())
+    elif isinstance(d, list):
+        return [convert_nested_dict(v) for v in d]
     return d