diff --git a/concrete/__init__.py b/concrete/__init__.py
new file mode 100644
index 000000000..02191637c
--- /dev/null
+++ b/concrete/__init__.py
@@ -0,0 +1,7 @@
+"""
+Declaration of `concrete` namespace.
+"""
+
+# Do not modify, this is to have a compatible namespace package
+# https://packaging.python.org/en/latest/guides/packaging-namespace-packages/#pkg-resources-style-namespace-packages
+__import__("pkg_resources").declare_namespace(__name__)  # pragma: no cover
diff --git a/concrete/numpy/__init__.py b/concrete/numpy/__init__.py
new file mode 100644
index 000000000..244980de6
--- /dev/null
+++ b/concrete/numpy/__init__.py
@@ -0,0 +1,3 @@
+"""
+Declaration of `concrete.numpy` namespace.
+"""