diff --git a/CosRayModifiedISO/CosRayModifiedISO.py b/CosRayModifiedISO/CosRayModifiedISO.py
index 2517a8c..136634f 100644
--- a/CosRayModifiedISO/CosRayModifiedISO.py
+++ b/CosRayModifiedISO/CosRayModifiedISO.py
@@ -10,6 +10,10 @@
 from CosRayModifiedISO.internalFunctions.rigidityEnergyConversionFunctions import convertParticleEnergySpecToRigiditySpec, convertParticleRigiditySpecToEnergySpec, convertParticleRigidityToEnergy, convertParticleEnergyToRigidity
 from CosRayModifiedISO.internalFunctions.spectrumHandling import ISOmodelSpectrum_fromSolarModulation
 
+import logging
+
+logging.basicConfig(level=logging.WARNING)
+
 def getEnergyFluxesFromEnergies(solarModulationWparameter:float, atomicNumber:int, energyListInMeV:list):
 
     energyListInMeV = convertToIterable(energyListInMeV)
@@ -57,6 +61,10 @@ def getSpectrumUsingOULUcountRate(OULUcountRatePerSecond:float, atomicNumber:int
 
 def getSpectrumUsingTimestamp(timestamp:dt.datetime, atomicNumber:int):
 
+    if timestamp.tzinfo is None:
+        logging.warning("The inputted timestamp does not have timezone info. Assuming UTC.")
+        timestamp = timestamp.replace(tzinfo=dt.timezone.utc)
+
     OULUcountRate = getOULUcountRateForTimestamp(timestamp)
     Wparameter = getWparameterFromOULUcountRate(OULUcountRate)
     return getSpectrumUsingSolarModulation(Wparameter, atomicNumber)
diff --git a/CosRayModifiedISO/neutronMonitorData/OULUinputData.pkl b/CosRayModifiedISO/neutronMonitorData/OULUinputData.pkl
index e4aae9c..ab2a430 100644
Binary files a/CosRayModifiedISO/neutronMonitorData/OULUinputData.pkl and b/CosRayModifiedISO/neutronMonitorData/OULUinputData.pkl differ
diff --git a/setup.py b/setup.py
index 23743b8..44f0f4c 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
     packages=find_packages(),
     package_data={"":["CosRayModifiedISO/neutronMonitorData/*.dat","CosRayModifiedISO/neutronMonitorData/*.pkl"]},
     include_package_data=True,
-    version='1.2.8',
+    version='1.2.9',
     url="https://github.com/ssc-maire/CosRayModifiedISO",
     author='Space Environment and Protection Group, University of Surrey',
     keywords='space physics galactic cosmic ray',
diff --git a/tests/test_DLRISOmodel.py b/tests/test_DLRISOmodel.py
index 67f0070..9e3f937 100644
--- a/tests/test_DLRISOmodel.py
+++ b/tests/test_DLRISOmodel.py
@@ -12,7 +12,7 @@ def test_energy_flux_output():
 
     assert round(outputEnergyFlux[0],7) == round(0.00012419,7)
 
-def test_timestamp_flux_output():
+def test_timestamp_flux_output_no_tzinfo():
 
     datetimeToUse = dt.datetime(
     year = 2001,
@@ -25,6 +25,29 @@ def test_timestamp_flux_output():
     
     outputtedSpectralDataFrame = CosRayModifiedISO.getSpectrumUsingTimestamp(datetimeToUse,atomicNumber=1)
 
+    assert round(outputtedSpectralDataFrame["Energy (MeV/n)"].iloc[0],5) == round(11.294627,5)
+    assert round(outputtedSpectralDataFrame["Energy (MeV/n)"].iloc[4],5) == round(28.370820,5)
+    assert round(outputtedSpectralDataFrame["Rigidity (GV/n)"].iloc[0],5) == round(0.146022,5)
+    assert round(outputtedSpectralDataFrame["Rigidity (GV/n)"].iloc[4],5) == round(0.232474,5)
+    assert round(outputtedSpectralDataFrame["d_Flux / d_E (cm-2 s-1 sr-1 (MeV/n)-1)"].iloc[0],10) == round(2.290835e-07,10)
+    assert round(outputtedSpectralDataFrame["d_Flux / d_E (cm-2 s-1 sr-1 (MeV/n)-1)"].iloc[4],10) == round(1.546788e-06,10)
+    assert round(outputtedSpectralDataFrame["d_Flux / d_R (cm-2 s-1 sr-1 (GV/n)-1)"].iloc[0],8) == round(3.522790e-05,8)
+    assert round(outputtedSpectralDataFrame["d_Flux / d_R (cm-2 s-1 sr-1 (GV/n)-1)"].iloc[4],8) == round(3.719962e-04,8)
+
+def test_timestamp_flux_output():
+
+    datetimeToUse = dt.datetime(
+    year = 2001,
+    month = 10,
+    day = 27,
+    hour = 0,
+    minute = 10,
+    second = 35,
+    tzinfo = dt.timezone.utc
+    )
+    
+    outputtedSpectralDataFrame = CosRayModifiedISO.getSpectrumUsingTimestamp(datetimeToUse,atomicNumber=1)
+
     assert round(outputtedSpectralDataFrame["Energy (MeV/n)"].iloc[0],5) == round(11.294627,5)
     assert round(outputtedSpectralDataFrame["Energy (MeV/n)"].iloc[4],5) == round(28.370820,5)
     assert round(outputtedSpectralDataFrame["Rigidity (GV/n)"].iloc[0],5) == round(0.146022,5)