diff --git a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimJobProperties.py b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimJobProperties.py
index 5203d99499bd17e450773b76fd36fdb0cc28a373..a74b68b3b74f6e385a280c118c4d411ac4ca994b 100644
--- a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimJobProperties.py
+++ b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimJobProperties.py
@@ -60,7 +60,7 @@ class ParamsInputFilename(JobProperty):
     """ Filename of the input parametrizations file. """
     statusOn     = True
     allowedTypes = ['str']
-    StoredValue  = 'FastCaloSim/MC16/TFCSparam_run2_reprocessing.root'
+    StoredValue  = 'FastCaloSim/MC16/TFCSparam_AF3_MC23_Sep23.root'
 
 class RunOnGPU(JobProperty):
     """Determines if run the FastCaloSim on GPU or not"""
diff --git a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
index 1ff43c38a89d2a9add6a07d5d50c99177b4efbf0..4b92a4c64494d2a5299085700ce93c8c00da94f3 100644
--- a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
+++ b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
@@ -64,7 +64,7 @@ def defaultTestFlags(configFlags, args):
     configFlags.Sim.BeamPipeSimMode = BeamPipeSimMode.FastSim
     configFlags.Sim.ISFRun = True
     configFlags.Sim.ISF.Simulator = SimulationFlavour.ATLFAST3MT
-    configFlags.Sim.FastCalo.ParamsInputFilename = "FastCaloSim/MC16/TFCSparam_run2_reprocessing.root"
+    configFlags.Sim.FastCalo.ParamsInputFilename = "FastCaloSim/MC16/TFCSparam_AF3_MC23_Sep23.root"
     configFlags.Sim.FastCalo.CaloCellsName = "AllCalo"
 
     configFlags.IOVDb.GlobalTag = "OFLCOND-MC16-SDR-14"
diff --git a/Simulation/SimulationConfig/python/SimConfigFlags.py b/Simulation/SimulationConfig/python/SimConfigFlags.py
index b804f48aa2ba2b2fc96c8af69a6c6444dfdf72d5..31acadf28800bcd8d3f4af14cc23bd4863f7f158 100644
--- a/Simulation/SimulationConfig/python/SimConfigFlags.py
+++ b/Simulation/SimulationConfig/python/SimConfigFlags.py
@@ -231,7 +231,7 @@ def createSimConfigFlags():
 
     scf.addFlag("Sim.ISF.HITSMergingRequired", _decideHITSMerging)
 
-    scf.addFlag("Sim.FastCalo.ParamsInputFilename", "FastCaloSim/MC16/TFCSparam_run2_reprocessing.root") # filename of the input parametrizations file
+    scf.addFlag("Sim.FastCalo.ParamsInputFilename", "FastCaloSim/MC16/TFCSparam_AF3_MC23_Sep23.root") # filename of the input parametrizations file
     scf.addFlag("Sim.FastCalo.RunOnGPU", False) # Determines if run the FastCaloSim on GPU or not
     scf.addFlag("Sim.FastCalo.CaloCellsName", "AllCalo") # StoreGate collection name for FastCaloSim hits