diff --git a/Lean.DataSource.DerivativeUniverseGenerator/ChainSymbolProvider.cs b/Lean.DataSource.DerivativeUniverseGenerator/ChainSymbolProvider.cs
index dd3fd96..927e627 100644
--- a/Lean.DataSource.DerivativeUniverseGenerator/ChainSymbolProvider.cs
+++ b/Lean.DataSource.DerivativeUniverseGenerator/ChainSymbolProvider.cs
@@ -175,8 +175,8 @@ private List<Symbol> GetSymbolsFromZipEntryNames(string zipFileName, Symbol cano
             if (canonicalSymbol.SecurityType.IsOption())
             {
                 symbols = symbols.OrderBy(symbol => symbol.ID.OptionRight)
-                    .ThenBy(symbol => symbol.ID.StrikePrice)
                     .ThenBy(symbol => symbol.ID.Date)
+                    .ThenBy(symbol => symbol.ID.StrikePrice)
                     .ThenBy(symbol => symbol.ID);
             }
             else