diff --git a/ClosedXML/Excel/ConditionalFormats/Save/XLCFContainsConverter.cs b/ClosedXML/Excel/ConditionalFormats/Save/XLCFContainsConverter.cs
index 3abf4c3..83ccf67 100644
--- a/ClosedXML/Excel/ConditionalFormats/Save/XLCFContainsConverter.cs
+++ b/ClosedXML/Excel/ConditionalFormats/Save/XLCFContainsConverter.cs
@@ -11,7 +11,7 @@
         public ConditionalFormattingRule Convert(IXLConditionalFormat cf, int priority, XLWorkbook.SaveContext context)
         {
             String val = cf.Values[1].Value;
-            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = cf.Operator.ToOpenXml(), Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
+            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = ConditionalFormattingOperatorValues.ContainsText, Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
 
             var formula = new Formula { Text = "NOT(ISERROR(SEARCH(\"" + val + "\"," + cf.Range.RangeAddress.FirstAddress.ToStringRelative(false) + ")))" };
 
diff --git a/ClosedXML/Excel/ConditionalFormats/Save/XLCFEndsWithConverter.cs b/ClosedXML/Excel/ConditionalFormats/Save/XLCFEndsWithConverter.cs
index 1fa1532..1425fc6 100644
--- a/ClosedXML/Excel/ConditionalFormats/Save/XLCFEndsWithConverter.cs
+++ b/ClosedXML/Excel/ConditionalFormats/Save/XLCFEndsWithConverter.cs
@@ -11,7 +11,7 @@
         public ConditionalFormattingRule Convert(IXLConditionalFormat cf, int priority, XLWorkbook.SaveContext context)
         {
             String val = cf.Values[1].Value;
-            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = cf.Operator.ToOpenXml(), Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
+            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = ConditionalFormattingOperatorValues.EndsWith, Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
 
             var formula = new Formula { Text = "RIGHT(" + cf.Range.RangeAddress.FirstAddress.ToStringRelative(false) + "," + val.Length.ToString() + ")=\"" + val + "\"" };
 
diff --git a/ClosedXML/Excel/ConditionalFormats/Save/XLCFNotContainsConverter.cs b/ClosedXML/Excel/ConditionalFormats/Save/XLCFNotContainsConverter.cs
index 86dcee8..6d86b12 100644
--- a/ClosedXML/Excel/ConditionalFormats/Save/XLCFNotContainsConverter.cs
+++ b/ClosedXML/Excel/ConditionalFormats/Save/XLCFNotContainsConverter.cs
@@ -11,7 +11,7 @@
         public ConditionalFormattingRule Convert(IXLConditionalFormat cf, int priority, XLWorkbook.SaveContext context)
         {
             String val = cf.Values[1].Value;
-            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = cf.Operator.ToOpenXml(), Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
+            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = ConditionalFormattingOperatorValues.NotContains, Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
 
             var formula = new Formula { Text = "ISERROR(SEARCH(\"" + val + "\"," + cf.Range.RangeAddress.FirstAddress.ToStringRelative(false) + "))" };
 
diff --git a/ClosedXML/Excel/ConditionalFormats/Save/XLCFStartsWithConverter.cs b/ClosedXML/Excel/ConditionalFormats/Save/XLCFStartsWithConverter.cs
index 82cfb88..7cee965 100644
--- a/ClosedXML/Excel/ConditionalFormats/Save/XLCFStartsWithConverter.cs
+++ b/ClosedXML/Excel/ConditionalFormats/Save/XLCFStartsWithConverter.cs
@@ -11,7 +11,7 @@
         public ConditionalFormattingRule Convert(IXLConditionalFormat cf, int priority, XLWorkbook.SaveContext context)
         {
             String val = cf.Values[1].Value;
-            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = cf.Operator.ToOpenXml(), Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
+            var conditionalFormattingRule = new ConditionalFormattingRule { FormatId = (UInt32)context.DifferentialFormats[cf.Style], Operator = ConditionalFormattingOperatorValues.BeginsWith, Text = val, Type = cf.ConditionalFormatType.ToOpenXml(), Priority = priority };
 
             var formula = new Formula { Text = "LEFT(" + cf.Range.RangeAddress.FirstAddress.ToStringRelative(false) + "," + val.Length.ToString() + ")=\"" + val + "\"" };