diff --git a/plc4py/pyproject.toml b/plc4py/pyproject.toml
index 4664602bd2..5cf52cc8c8 100644
--- a/plc4py/pyproject.toml
+++ b/plc4py/pyproject.toml
@@ -32,7 +32,7 @@ description = "Plc4Py The Python Industrial IOT Adapter"
 version = "0.13"
 readme = "README.md"
 dependencies = [
-        "aenum",
+        "aenum>=3.1.15",
         "bitarray",
         "typing_extensions",
         "pluggy",