diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7d716007..e3356722 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,23 +14,23 @@ repos:
   - id: check-toml
 
 - repo: https://github.com/neutrinoceros/inifix.git
-  rev: v4.4.0
+  rev: v4.4.1
   hooks:
   - id: inifix-format
 
 - repo: https://github.com/psf/black-pre-commit-mirror
-  rev: 23.3.0
+  rev: 23.9.1
   hooks:
   - id: black
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.0.276
+  rev: v0.0.292
   hooks:
   - id: ruff
     args: [--fix]
 
 - repo: https://github.com/macisamuele/language-formatters-pre-commit-hooks
-  rev: v2.9.0
+  rev: v2.10.0
   hooks:
   - id: pretty-format-yaml
     args: [--autofix, --indent, '2']
diff --git a/nonos/main.py b/nonos/main.py
index cc39c518..d54cf2b8 100644
--- a/nonos/main.py
+++ b/nonos/main.py
@@ -113,7 +113,7 @@ def process_field(
         dsop_dict = dsop.coords.get_attributes
         default_plane = []
         for key, val in dsop_dict.items():
-            if type(val) != str and val.shape[0] > 2:
+            if not isinstance(val, str) and val.shape[0] > 2:
                 default_plane.append(key)
         # default_plane = ["x","y"]
         plane = default_plane