diff --git a/ApplicationCode/ProjectDataModel/Summary/RimEnsembleCurveSet.h b/ApplicationCode/ProjectDataModel/Summary/RimEnsembleCurveSet.h
index 740f625aff..9c905abf14 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimEnsembleCurveSet.h
+++ b/ApplicationCode/ProjectDataModel/Summary/RimEnsembleCurveSet.h
@@ -88,6 +88,8 @@ public:
     ColorMode                               colorMode() const;
     EnsembleParameterType                   currentEnsembleParameterType() const;
 
+    void                                    updateAllCurves();
+
 private:
     caf::PdmFieldHandle*                    userDescriptionField() override;
     caf::PdmFieldHandle*                    objectToggleField();
@@ -110,7 +112,6 @@ private:
 
     void                                    updateCurveColors();
     void                                    updateQwtPlotAxis();
-    void                                    updateAllCurves();
     std::vector<QString>                    ensembleParameters() const;
 
     QString                                 createAutoName() const;
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
index 90d6e63f5e..beedbe85b7 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.cpp
@@ -19,6 +19,7 @@
 #include "RimSummaryCaseCollection.h"
 
 #include "RimGridSummaryCase.h"
+#include "RimEnsembleCurveSet.h"
 #include "RimProject.h"
 #include "RimSummaryCase.h"
 
@@ -43,6 +44,7 @@ RimSummaryCaseCollection::RimSummaryCaseCollection()
 RimSummaryCaseCollection::~RimSummaryCaseCollection()
 {
     m_cases.deleteAllChildObjects();
+    updateReferringCurveSets();
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -51,6 +53,7 @@ RimSummaryCaseCollection::~RimSummaryCaseCollection()
 void RimSummaryCaseCollection::removeCase(RimSummaryCase* summaryCase)
 {
     m_cases.removeChildObject(summaryCase);
+    updateReferringCurveSets();
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -59,6 +62,7 @@ void RimSummaryCaseCollection::removeCase(RimSummaryCase* summaryCase)
 void RimSummaryCaseCollection::addCase(RimSummaryCase* summaryCase)
 {
     m_cases.push_back(summaryCase);
+    updateReferringCurveSets();
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -92,3 +96,19 @@ caf::PdmFieldHandle* RimSummaryCaseCollection::userDescriptionField()
 {
     return &m_name;
 }
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RimSummaryCaseCollection::updateReferringCurveSets() const
+{
+    // Update curve set referring to this group
+    std::vector<PdmObjectHandle*> referringObjects;
+    objectsWithReferringPtrFields(referringObjects);
+
+    for (PdmObjectHandle* obj : referringObjects)
+    {
+        RimEnsembleCurveSet* curveSet = dynamic_cast<RimEnsembleCurveSet*>(obj);
+        if (curveSet) curveSet->updateAllCurves();
+    }
+}
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.h b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.h
index 8881db1d3b..efb9500549 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.h
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCaseCollection.h
@@ -42,6 +42,7 @@ public:
 
 private:
     caf::PdmFieldHandle* userDescriptionField() override;
+    void                 updateReferringCurveSets() const;
 
 private:
     caf::PdmChildArrayField<RimSummaryCase*> m_cases;