diff --git a/pyproject.toml b/pyproject.toml
index 3ed4cacb9de4683d26701a5b0ce77990f45d53b8..5c89a7cbdf1967724798337cfdb28439e8b66970 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,6 +39,7 @@ dependencies = [
     "earthaccess",
     "requests",
     "typer",
+    "python-magic",
 ]
 
 [project.urls]
diff --git a/src/cso/cso_file.py b/src/cso/cso_file.py
index 5bb4eda2051467dd10dcececca828a4d8177c711..0da54bd91cef0d1eb495d56638b38c78ea6b2cfe 100644
--- a/src/cso/cso_file.py
+++ b/src/cso/cso_file.py
@@ -53,6 +53,9 @@
 #   Set flag to avoid warnings when decoding time arrays from VIIRS files.
 #
 # 2025-09, Arjo Segers
+#   Let 'GetData' return all attributes rather than just 'units'.
+#
+# 2025-09, Arjo Segers
 #   Improved speed of CSO_Listing.Selection method.
 #
 # 2025-10, Arjo Segers
@@ -684,7 +687,7 @@ class CSO_File(object):
 
     def GetData(self, varname):
         """
-        Return data values and units for named variable.
+        Return data values and attributes for named variable.
         """
 
         # check ...
@@ -703,7 +706,7 @@ class CSO_File(object):
         # endif
 
         # ok
-        return self.ds[varname].values, self.ds[varname].attrs["units"]
+        return self.ds[varname].values, self.ds[varname].attrs
 
     # enddef GetData