diff --git a/pyproject.toml b/pyproject.toml
index 4cd8a5a..8b532d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,6 @@ dependencies = [
     "scipy",
     "tables",
     "torch",
-    "zict<3.0.0",
 ]
 
 classifiers = [
diff --git a/src/blop/dofs.py b/src/blop/dofs.py
index 321da6f..95cc2fb 100644
--- a/src/blop/dofs.py
+++ b/src/blop/dofs.py
@@ -13,16 +13,16 @@
 
 DOF_FIELD_TYPES = {
     "description": "str",
+    "units": "str",
     "readback": "object",
     "type": "str",
-    "units": "str",
+    "active": "bool",
+    "read_only": "bool",
     "tags": "object",
     "transform": "str",
     "search_domain": "object",
     "trust_domain": "object",
     "domain": "object",
-    "active": "bool",
-    "read_only": "bool",
 }
 
 DOF_TYPES = ["continuous", "binary", "ordinal", "categorical"]
diff --git a/src/blop/objectives.py b/src/blop/objectives.py
index 5f7ae71..fb783bf 100644
--- a/src/blop/objectives.py
+++ b/src/blop/objectives.py
@@ -15,6 +15,7 @@
     "name": "str",
     "description": "object",
     "type": "str",
+    "kind": "str",
     "target": "object",
     "transform": "str",
     "domain": "str",