diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/energySourceProperties b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/energySourceProperties
index ba68f2616fcfc8ff9c9681aa10269f58f1af4180..bcb527b17252de76f74fbac2adf86d8c417b9048 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/energySourceProperties
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/energySourceProperties
@@ -23,7 +23,7 @@ FoamFile
         duration        0.2;
         selectionMode   cellSet;
         volumeMode      absolute;
-        fieldData       15000;
+        fieldData       20000;
         cellSet         ignitionCells;
     }
 );