diff --git a/tutorials/immersedBoundary/movingCylinderInChannelIco/system/decomposeParDict b/tutorials/immersedBoundary/movingCylinderInChannelIco/system/decomposeParDict
index ac8a5b2d6..191f77978 100644
--- a/tutorials/immersedBoundary/movingCylinderInChannelIco/system/decomposeParDict
+++ b/tutorials/immersedBoundary/movingCylinderInChannelIco/system/decomposeParDict
@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-numberOfSubdomains 3;
+numberOfSubdomains 10;
 
 method scotch;