diff --git a/python/MRzeroCore/phantom/nifti_phantom.py b/python/MRzeroCore/phantom/nifti_phantom.py
index 9bd3218..4ac56fc 100644
--- a/python/MRzeroCore/phantom/nifti_phantom.py
+++ b/python/MRzeroCore/phantom/nifti_phantom.py
@@ -118,7 +118,7 @@ def default(cls, density: NiftiRef):
     @classmethod
     def from_dict(cls, config: dict[str, Any]):
         def parse_prop(prop):
-            if isinstance(prop, float):
+            if isinstance(prop, (float, int)):
                 return float(prop)
             elif isinstance(prop, str):
                 return NiftiRef.parse(prop)