diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/chemistryProperties b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/chemistryProperties
index 7eafdcb45a..7faec04f7e 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/chemistryProperties
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/chemistryProperties
@@ -33,7 +33,8 @@ EulerImplicitCoeffs
 odeCoeffs
 {
     solver          seulex;
-    eps             0.05;
+    absTol          1e-8;
+    relTol          1e-1;
 }
 
 
diff --git a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/foam.inp b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/foam.inp
index 3bf043478b..533d3c0dd3 100644
--- a/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/foam.inp
+++ b/tutorials/lagrangian/coalChemistryFoam/simplifiedSiwek/constant/foam.inp
@@ -17,6 +17,8 @@ reactions
         A        7e+06;
         beta     0;
         Ta       10063.8;
+        Thigh    2500;
+        Tlow     300;
     }
     hydrogenReaction
     {
@@ -25,6 +27,7 @@ reactions
         A        4.74342e+12;
         beta     0;
         Ta       10063.8;
+        Thigh    2500;
+        Tlow     300;
     }
 }
-