diff --git a/apps/showcases/ChargedParticles/parameterfiles/ForceValidationSingleParticle.prm b/apps/showcases/ChargedParticles/parameterfiles/ForceValidationSingleParticle.prm
index e0f666c2ab5e08f423ca66e0357ebac5285fec87..dec54b1d6a1bdf615140a9bcb113da6b94ba23cc 100644
--- a/apps/showcases/ChargedParticles/parameterfiles/ForceValidationSingleParticle.prm
+++ b/apps/showcases/ChargedParticles/parameterfiles/ForceValidationSingleParticle.prm
@@ -35,6 +35,8 @@ NumericalSetup
     numXBlocks 2;
     numYBlocks 2;
     numZBlocks 2;
+    absResThreshold 1e-19;
+    jacobiIterations 1000;
 
     useLubricationForces true;
     numberOfParticleSubCycles 10;
diff --git a/apps/showcases/ChargedParticles/parameterfiles/singleParticle.prm b/apps/showcases/ChargedParticles/parameterfiles/singleParticle.prm
index ebd2f7320da5ce9a6ae32c9882434db8fb65725c..5a8bbb10d819a9386ab2a2baf6f01a770817f989 100644
--- a/apps/showcases/ChargedParticles/parameterfiles/singleParticle.prm
+++ b/apps/showcases/ChargedParticles/parameterfiles/singleParticle.prm
@@ -35,6 +35,8 @@ NumericalSetup
     numXBlocks 2;
     numYBlocks 2;
     numZBlocks 2;
+    absResThreshold 1e-19;
+    jacobiIterations 1000;
 
     useLubricationForces true;
     numberOfParticleSubCycles 10;