diff --git a/python/src/bind_Cluster.hpp b/python/src/bind_Cluster.hpp
index eca0881..7907cde 100644
--- a/python/src/bind_Cluster.hpp
+++ b/python/src/bind_Cluster.hpp
@@ -23,7 +23,7 @@ void define_Cluster(py::module &m, const std::string &typestr) {
     auto class_name = fmt::format("Cluster{}", typestr);
 
     py::class_<Cluster<Type, ClusterSizeX, ClusterSizeY, CoordType>>(
-        m, class_name.c_str(), py::buffer_protocol())
+        m, class_name.c_str(), py::buffer_protocol(), py::module_local())
 
         .def(py::init([](CoordType x, CoordType y,
                          py::array_t<Type, py::array::forcecast> data) {
diff --git a/python/src/bind_ClusterVector.hpp b/python/src/bind_ClusterVector.hpp
index 254f96a..d4cbc3f 100644
--- a/python/src/bind_ClusterVector.hpp
+++ b/python/src/bind_ClusterVector.hpp
@@ -31,7 +31,8 @@ void define_ClusterVector(py::module &m, const std::string &typestr) {
     py::class_<ClusterVector<
         Cluster<Type, ClusterSizeX, ClusterSizeY, CoordType>, void>>(
         m, class_name.c_str(),
-        py::buffer_protocol())
+        py::buffer_protocol(),
+        py::module_local())
 
         .def(py::init()) // TODO change!!!