diff --git a/x/wasm/keeper/query_plugins.go b/x/wasm/keeper/query_plugins.go
index 91abcf5dc6..e6be4dde76 100644
--- a/x/wasm/keeper/query_plugins.go
+++ b/x/wasm/keeper/query_plugins.go
@@ -600,6 +600,7 @@ func ConvertProtoToJSONMarshal(cdc codec.Codec, protoResponse codec.ProtoMarshal
 		return nil, sdkerrors.Wrap(err, "to json")
 	}
 
+	protoResponse.Reset()
 	return bz, nil
 }