diff --git a/docs/source/index.rst b/docs/source/index.rst
index 4f839e6..92c5bf7 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -17,9 +17,9 @@ FileFormats
    :target: https://github.com/ArcanaFramework/fileformats
 
 
-*Fileformats* is a library of Python classes that correspond to different file formats
-for file-type detection/validation, MIME-type lookup and file handling. The format classes also
-provide hooks for methods to read and manipulate the data contained in the files to
+*Fileformats* is a Python library for file-type detection/validation, MIME-type lookup and file handling.
+It contains a collection format classes that each correspond to a different file formats.
+The format classes also provide hooks for methods to read and manipulate the data contained in the files to
 facilitate the writing of duck-typed code. Unlike other Python packages, multi-file data
 formats, e.g. with separate header/data files or directories containing specific files,
 are supported, and can be handled just like single file types.
diff --git a/fileformats/core/datatype.py b/fileformats/core/datatype.py
index 27f9516..210cade 100644
--- a/fileformats/core/datatype.py
+++ b/fileformats/core/datatype.py
@@ -88,7 +88,7 @@ def matches(cls, values: ty.Any) -> bool:
         """
         try:
             cls(values)  # type: ignore
-        except FormatMismatchError:
+        except (FormatMismatchError, FileNotFoundError):
             return False
         else:
             return True