diff --git a/tests/test_init.py b/tests/test_init.py
new file mode 100644
index 0000000..2a40a6e
--- /dev/null
+++ b/tests/test_init.py
@@ -0,0 +1,12 @@
+import sys
+
+import pytest
+
+from thehive4py import _warn_old_py_version
+
+
+def test_warn_old_py_version():
+    actual_py_version = sys.version_info
+    dummy_min_py_version = (actual_py_version[0], actual_py_version[1] + 1)
+    with pytest.deprecated_call():
+        _warn_old_py_version(min_py_version=dummy_min_py_version)
diff --git a/thehive4py/__init__.py b/thehive4py/__init__.py
index 21f8458..fec3ac5 100644
--- a/thehive4py/__init__.py
+++ b/thehive4py/__init__.py
@@ -1 +1,20 @@
 from thehive4py.client import TheHiveApi
+
+
+def _warn_old_py_version(min_py_version=(3, 9)):
+    import sys
+    import warnings
+
+    if sys.version_info < min_py_version:
+        warnings.warn(
+            message=(
+                "thehive4py will drop support for Python versions below "
+                f"{min_py_version[0]}.{min_py_version[1]}, as they have reached their "
+                "end of life. Please upgrade to a newer version as soon as possible."
+            ),
+            category=DeprecationWarning,
+            stacklevel=3,
+        )
+
+
+_warn_old_py_version()