diff --git a/mobie/__version__.py b/mobie/__version__.py
index 5cf7c04..dcd0e47 100644
--- a/mobie/__version__.py
+++ b/mobie/__version__.py
@@ -1,2 +1,2 @@
-__version__ = "0.3.2"
+__version__ = "0.4.0"
 SPEC_VERSION = "0.3.0"
diff --git a/mobie/tables/default_table.py b/mobie/tables/default_table.py
index 369fb74..28966e6 100644
--- a/mobie/tables/default_table.py
+++ b/mobie/tables/default_table.py
@@ -32,6 +32,7 @@ def _compute_table_2d(seg_path, seg_key, resolution):
     ndim = 2
     with open_file(seg_path, "r") as f:
         seg = f[seg_key][:]
+    assert len(resolution) == seg.ndim == ndim
 
     centers = vigra.filters.eccentricityCenters(seg.astype("uint32"))
     props = regionprops(seg)