diff --git a/teaser/logic/buildingobjects/calculation/aixlib.py b/teaser/logic/buildingobjects/calculation/aixlib.py
index c6ebb2ad7..ecc888d10 100644
--- a/teaser/logic/buildingobjects/calculation/aixlib.py
+++ b/teaser/logic/buildingobjects/calculation/aixlib.py
@@ -61,7 +61,7 @@ def __init__(self, parent):
         self.file_set_t_cool = "TsetCool_" + self.parent.name + ".txt"
         self.file_ahu = "AHU_" + self.parent.name + ".txt"
         self.file_internal_gains = "InternalGains_" + self.parent.name + ".txt"
-        self.version = "1.3.2"
+        self.version = "2.1.0"
         self.total_surface_area = None
         self.consider_heat_capacity = True
         self.use_set_back = True