diff --git a/redfish-core/lib/update_service.hpp b/redfish-core/lib/update_service.hpp
index ddb46f6..3d58d0d 100644
--- a/redfish-core/lib/update_service.hpp
+++ b/redfish-core/lib/update_service.hpp
@@ -23,6 +23,7 @@
 #include "query.hpp"
 #include "registries/privilege_registry.hpp"
 #include "task.hpp"
+#include "utils/collection.hpp"
 #include "utils/dbus_utils.hpp"
 #include "utils/sw_utils.hpp"
 
@@ -842,47 +843,13 @@
         asyncResp->res.jsonValue["@odata.id"] =
             "/redfish/v1/UpdateService/FirmwareInventory";
         asyncResp->res.jsonValue["Name"] = "Software Inventory Collection";
-
-        // Note that only firmware levels associated with a device
-        // are stored under /xyz/openbmc_project/software therefore
-        // to ensure only real FirmwareInventory items are returned,
-        // this full object path must be used here as input to
-        // mapper
-        constexpr std::array<std::string_view, 1> interfaces = {
+        const std::array<const std::string_view, 1> iface = {
             "xyz.openbmc_project.Software.Version"};
-        dbus::utility::getSubTree(
-            "/xyz/openbmc_project/software", 0, interfaces,
-            [asyncResp](
-                const boost::system::error_code& ec,
-                const dbus::utility::MapperGetSubTreeResponse& subtree) {
-            if (ec)
-            {
-                messages::internalError(asyncResp->res);
-                return;
-            }
-            asyncResp->res.jsonValue["Members"] = nlohmann::json::array();
-            asyncResp->res.jsonValue["Members@odata.count"] = 0;
 
-            for (const auto& obj : subtree)
-            {
-                sdbusplus::message::object_path path(obj.first);
-                std::string swId = path.filename();
-                if (swId.empty())
-                {
-                    messages::internalError(asyncResp->res);
-                    BMCWEB_LOG_DEBUG << "Can't parse firmware ID!!";
-                    return;
-                }
-
-                nlohmann::json& members = asyncResp->res.jsonValue["Members"];
-                nlohmann::json::object_t member;
-                member["@odata.id"] = boost::urls::format(
-                    "/redfish/v1/UpdateService/FirmwareInventory/{}", swId);
-                members.emplace_back(std::move(member));
-                asyncResp->res.jsonValue["Members@odata.count"] =
-                    members.size();
-            }
-            });
+        redfish::collection_util::getCollectionMembers(
+            asyncResp,
+            boost::urls::url("/redfish/v1/UpdateService/FirmwareInventory"),
+            iface, "/xyz/openbmc_project/software");
         });
 }
 /* Fill related item links (i.e. bmc, bios) in for inventory */