diff --git a/pyproject.toml b/pyproject.toml
index 18ccf47..430db90 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ description = "pydra-tasks-mrtrix3 contains Pydra task specifications for MRtrix
 readme = "README.rst"
 requires-python = ">=3.11"
 dependencies = [
-    "fileformats-medimage_mrtrix3 >=3.0.4a5",
+    "fileformats-vendor-mrtrix3 >=3.0.4a5",
     "numpy",
     "pydra>=1.0a2"
 ]
@@ -53,7 +53,7 @@ test = [
     "pytest-xdist",
     "pytest-rerunfailures",
     "codecov",
-    "fileformats-medimage_mrtrix3-extras",
+    "fileformats-vendor-mrtrix3-extras",
 ]
 
 [tool.hatch.version]
diff --git a/related-packages/fileformats/fileformats/vendor/mrtrix3/__init__.py b/related-packages/fileformats/fileformats/vendor/mrtrix3/__init__.py
new file mode 100644
index 0000000..a98c6c1
--- /dev/null
+++ b/related-packages/fileformats/fileformats/vendor/mrtrix3/__init__.py
@@ -0,0 +1,5 @@
+from ._version import __version__
+
+__all__ = [
+    "__version__",
+]
diff --git a/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/__init__.py b/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/__init__.py
index 347686c..87d7067 100644
--- a/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/__init__.py
+++ b/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/__init__.py
@@ -1,5 +1,3 @@
-from .._version import __version__
-
 from .image import ImageFormat, ImageFormatGz, ImageHeader, ImageDataFile
 from .in_out import ImageIn, ImageOut
 from .dwi import (
diff --git a/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/tests/test_mime.py b/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/tests/test_mime.py
index c9ddb0f..f17c269 100644
--- a/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/tests/test_mime.py
+++ b/related-packages/fileformats/fileformats/vendor/mrtrix3/medimage/tests/test_mime.py
@@ -1,4 +1,5 @@
 from fileformats.core import from_mime
+from fileformats.generic import DirectoryOf
 from fileformats.vendor.mrtrix3.medimage import ImageFormatGz as MifGz
 
 
@@ -8,3 +9,7 @@ def test_mif_gz_mime_roundtrip():
 
 def test_mif_gz_mime_like_roundtrip():
     assert MifGz is from_mime(MifGz.mime_like)
+
+
+def test_mif_gz_directory_of_mime_like_roundtrip():
+    assert DirectoryOf[MifGz] is from_mime(DirectoryOf[MifGz].mime_like)