diff --git a/bind/python/iguana-python-example.py b/bind/python/iguana-python-example.py
index 5a984b25..7c402371 100755
--- a/bind/python/iguana-python-example.py
+++ b/bind/python/iguana-python-example.py
@@ -19,13 +19,10 @@
 seq.Add('clas12::LorentzTransformer')
 seq.PrintSequence()
 
-seq.SetOption('clas12::EventBuilderFilter', 'log',       'trace')
+seq.SetOption('clas12::EventBuilderFilter', 'log',  'trace')
+seq.SetOption('clas12::EventBuilderFilter', 'pids', [11, 211, -211])
 seq.SetOption('clas12::EventBuilderFilter', 'testInt',   7)
 seq.SetOption('clas12::EventBuilderFilter', 'testFloat', 42.3)
-# # TODO: need to marshal std::set
-# seq.SetOption('clas12::EventBuilderFilter', 'pids',  [11,211,-211])
-# cppyy.cppexec('iguana::option_t pids = std::set<int>{11,211,-211};')
-# seq.SetOption('clas12::EventBuilderFilter', 'pids', cppyy.gbl.pids)
 
 def prettyPrint(message, bank):
     print(f'{"="*30} {message} {"="*30}')
diff --git a/examples/iguana-example-00-basic.cc b/examples/iguana-example-00-basic.cc
index 6ac1aa70..fd50729d 100644
--- a/examples/iguana-example-00-basic.cc
+++ b/examples/iguana-example-00-basic.cc
@@ -31,7 +31,7 @@ int main(int argc, char **argv) {
   seq.SetOption("clas12::LorentzTransformer", "log", "debug");
 
   // set algorithm options
-  seq.SetOption("clas12::EventBuilderFilter", "pids",  std::set<int>{11, 211, -211});
+  seq.SetOption<std::vector<int>>("clas12::EventBuilderFilter", "pids", {11, 211, -211});
   seq.SetOption("clas12::LorentzTransformer", "frame", "mirror");
 
   // start the algorithms
diff --git a/src/iguana/algorithms/Algorithm.cc b/src/iguana/algorithms/Algorithm.cc
index 6e7147a6..ec8d1512 100644
--- a/src/iguana/algorithms/Algorithm.cc
+++ b/src/iguana/algorithms/Algorithm.cc
@@ -22,7 +22,7 @@ namespace iguana {
       if      (const auto valPtr(std::get_if<int>(&val));           valPtr) return fmt::format("{} [{}]", *valPtr,                 "int");
       else if (const auto valPtr(std::get_if<double>(&val));        valPtr) return fmt::format("{} [{}]", *valPtr,                 "double");
       else if (const auto valPtr(std::get_if<std::string>(&val));   valPtr) return fmt::format("{} [{}]", *valPtr,                 "string");
-      else if (const auto valPtr(std::get_if<std::set<int>>(&val)); valPtr) return fmt::format("({}) [{}]", fmt::join(*valPtr,", "), "set<int>");
+      else if (const auto valPtr(std::get_if<std::vector<int>>(&val)); valPtr) return fmt::format("({}) [{}]", fmt::join(*valPtr,", "), "vector<int>");
       else {
         m_log->Error("option '{}' type has no printer defined in Algorithm::PrintOptionValue", key);
         return "UNKNOWN";
diff --git a/src/iguana/algorithms/Algorithm.h b/src/iguana/algorithms/Algorithm.h
index 6ea7ef0d..a49a49f1 100644
--- a/src/iguana/algorithms/Algorithm.h
+++ b/src/iguana/algorithms/Algorithm.h
@@ -1,8 +1,8 @@
 #pragma once
 
-#include <set>
 #include <variant>
 #include <vector>
+#include <set>
 #include <unordered_map>
 #include <algorithm>
 #include <functional>
@@ -18,7 +18,7 @@ namespace iguana {
     int,
     double,
     std::string,
-    std::set<int>
+    std::vector<int>
   >;
 
   /// @brief Base class for all algorithms to inherit from
@@ -107,6 +107,18 @@ namespace iguana {
           m_log->Debug("OPTION: {:>20} = {}", key, PrintOptionValue(key));
         }
 
+      /// Cache an option of type `std::vector` and convert it to `std::set`
+      /// @see `Algorithm::CacheOption`
+      /// @param[in] key the name of the option
+      /// @param[in] def the default `std::vector`
+      /// @param[out] val reference to the `std::set` option
+      template <typename T>
+        void CacheVectorOptionToSet(const std::string key, const std::vector<T> def, std::set<T>& val) {
+          std::vector<T> vec;
+          CacheOption(key, def, vec);
+          std::copy(vec.begin(), vec.end(), std::inserter(val, val.end()));
+        }
+
       /// Return a string with the value of an option along with its type
       /// @param key the name of the option
       /// @return the string value and its type
diff --git a/src/iguana/algorithms/clas12/EventBuilderFilter.cc b/src/iguana/algorithms/clas12/EventBuilderFilter.cc
index bb25678d..297f915d 100644
--- a/src/iguana/algorithms/clas12/EventBuilderFilter.cc
+++ b/src/iguana/algorithms/clas12/EventBuilderFilter.cc
@@ -11,7 +11,7 @@ namespace iguana::clas12 {
   void EventBuilderFilter::Start(hipo::banklist& banks) {
 
     // define options, their default values, and cache them
-    CacheOption("pids", std::set<int>{11, 211}, o_pids);
+    CacheVectorOptionToSet("pids", {11, 211}, o_pids);
     CacheOption("testInt", 8, o_testInt); // TODO: remove
     CacheOption("testFloat", 7.0, o_testFloat); // TODO: remove