diff --git a/src/hdf5_vis.py b/src/hdf5_vis.py
index e771b30..40c8977 100644
--- a/src/hdf5_vis.py
+++ b/src/hdf5_vis.py
@@ -28,8 +28,15 @@ def display_group_hierarchy_on_a_treemap(filename: str):
         metadata_dict={}
         for key in file.attrs.keys():            
             #if 'metadata' in key:
-            metadata_dict[key[key.find('_')+1::]]= file.attrs[key]
-            metadata_list.append(key[key.find('_')+1::]+':'+file.attrs[key])
+            if isinstance(file.attrs[key], str):  # Check if the attribute is a string
+                metadata_key = key[key.find('_') + 1:]
+                metadata_value = file.attrs[key]
+                metadata_dict[metadata_key] = metadata_value
+                metadata_list.append(f'{metadata_key}: {metadata_value}')
+            
+            #metadata_dict[key[key.find('_')+1::]]= file.attrs[key]
+            #metadata_list.append(key[key.find('_')+1::]+':'+file.attrs[key])
+
         metadata = '<br>'.join(['<br>'] + metadata_list)
 
     customdata_series = pd.Series(nodes)