diff --git a/Framework/include/QualityControl/SliceTrendingTask.h b/Framework/include/QualityControl/SliceTrendingTask.h
index f658c4b3cf..3a93526baa 100644
--- a/Framework/include/QualityControl/SliceTrendingTask.h
+++ b/Framework/include/QualityControl/SliceTrendingTask.h
@@ -50,7 +50,7 @@ namespace o2::quality_control::postprocessing
 /// and input/output canvas can be dealt with alongside normal histograms.
 ///
 
-class SliceTrendingTask : public PostProcessingInterface
+class SliceTrendingTask final : public PostProcessingInterface
 {
  public:
   /// \brief Constructor.
diff --git a/Modules/TPC/include/TPC/QualityObserver.h b/Modules/TPC/include/TPC/QualityObserver.h
index f09846ab8f..4dc142f66a 100644
--- a/Modules/TPC/include/TPC/QualityObserver.h
+++ b/Modules/TPC/include/TPC/QualityObserver.h
@@ -39,7 +39,7 @@ namespace o2::quality_control_modules::tpc
 /// as ouput.
 ///
 
-class QualityObserver : public PostProcessingInterface
+class QualityObserver final : public PostProcessingInterface
 {
  public:
   /// \brief Constructor.
diff --git a/Modules/TPC/include/TPC/RatioGeneratorTPC.h b/Modules/TPC/include/TPC/RatioGeneratorTPC.h
index e040cc5b43..a12f68a0dd 100644
--- a/Modules/TPC/include/TPC/RatioGeneratorTPC.h
+++ b/Modules/TPC/include/TPC/RatioGeneratorTPC.h
@@ -37,7 +37,7 @@ namespace o2::quality_control_modules::tpc
 /// It takes two TH1 objects as input, calculates the ratio and stores the ratio TH1 on ccdb/qcg.
 ///
 
-class RatioGeneratorTPC : public PostProcessingInterface
+class RatioGeneratorTPC final : public PostProcessingInterface
 {
  public:
   /// \brief Constructor.
diff --git a/Modules/TPC/include/TPC/TrendingTaskTPC.h b/Modules/TPC/include/TPC/TrendingTaskTPC.h
index 6849e798db..b73ef7f0e2 100644
--- a/Modules/TPC/include/TPC/TrendingTaskTPC.h
+++ b/Modules/TPC/include/TPC/TrendingTaskTPC.h
@@ -46,7 +46,7 @@ namespace o2::quality_control_modules::tpc
 /// and input/output canvas can be dealt with alongside normal histograms.
 ///
 
-class TrendingTaskTPC : public PostProcessingInterface
+class TrendingTaskTPC final : public PostProcessingInterface
 {
  public:
   /// \brief Constructor.