diff --git a/morphio/__init__.py b/morphio/__init__.py
index 53a3fe6b..a7af3bd3 100644
--- a/morphio/__init__.py
+++ b/morphio/__init__.py
@@ -56,3 +56,49 @@
     vasculature,
     version,
 )
+
+__all__ = [
+    "Annotation",
+    "AnnotationType",
+    "CellFamily",
+    "CellLevel",
+    "Collection",
+    "DendriticSpine",
+    "EndoplasmicReticulum",
+    "GlialCell",
+    "IDSequenceError",
+    "IterType",
+    "LogLevel",
+    "MissingParentError",
+    "MitoSection",
+    "Mitochondria",
+    "MitochondriaPointLevel",
+    "MorphioError",
+    "Morphology",
+    "MultipleTrees",
+    "Option",
+    "PointLevel",
+    "Points",
+    "PostSynapticDensity",
+    "Properties",
+    "RawDataError",
+    "Section",
+    "SectionBuilderError",
+    "SectionLevel",
+    "SectionType",
+    "Soma",
+    "SomaError",
+    "SomaType",
+    "UnknownFileType",
+    "VasculatureSectionType",
+    "Warning",
+    "WarningHandlerCollector",
+    "WriterError",
+    "mut",
+    "ostream_redirect",
+    "set_ignored_warning",
+    "set_raise_warnings",
+    "set_maximum_warnings",
+    "vasculature",
+    "version",
+]