diff --git a/api/utils/serializer/serializer.py b/api/utils/serializer/serializer.py
index 4924d742..9fcd5338 100644
--- a/api/utils/serializer/serializer.py
+++ b/api/utils/serializer/serializer.py
@@ -156,6 +156,8 @@ class AbstractModelAPISerializer:
         if isinstance(geojson, dict):
             geojson = json.dumps(geojson)
         geometry = geos.fromstr(geojson)
+        if not geometry.valid:
+            raise ValueError(f"Invalid geometry: {geometry.valid_reason}")
         is_4326 = Geometry.is_valid_4326(geometry)
         if not is_4326:
             raise ValueError("Geometry not in EPSG:4326 (WGS84). Unknown spatial reference system.")
diff --git a/konova/utils/__init__.py b/konova/utils/__init__.py
new file mode 100644
index 00000000..310b8ff3
--- /dev/null
+++ b/konova/utils/__init__.py
@@ -0,0 +1,5 @@
+"""
+Author: Michel Peltriaux
+Created on: 16.07.26
+
+"""
diff --git a/konova/utils/schneider/__init__.py b/konova/utils/schneider/__init__.py
new file mode 100644
index 00000000..310b8ff3
--- /dev/null
+++ b/konova/utils/schneider/__init__.py
@@ -0,0 +1,5 @@
+"""
+Author: Michel Peltriaux
+Created on: 16.07.26
+
+"""