diff --git a/internal/cache/bootstrap.go b/internal/cache/bootstrap.go
index b5f2879..d22f672 100644
--- a/internal/cache/bootstrap.go
+++ b/internal/cache/bootstrap.go
@@ -22,8 +22,9 @@ func bootstrapCache(
 	lo *slog.Logger,
 ) error {
 	var (
-		tokenRegistryGetter = w3.MustNewFunc("tokenRegistry()", "address")
-		quoterGetter        = w3.MustNewFunc("quoter()", "address")
+		tokenRegistryGetter  = w3.MustNewFunc("tokenRegistry()", "address")
+		quoterGetter         = w3.MustNewFunc("quoter()", "address")
+		systemAcccountGetter = w3.MustNewFunc("systemAccount()", "address")
 	)
 
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute*5)
@@ -46,6 +47,23 @@ func bootstrapCache(
 			}
 		}
 
+		if custodialRegistrationProxy := registryMap[ethutils.CustodialProxy]; custodialRegistrationProxy != ethutils.ZeroAddress {
+			var systemAccount common.Address
+			err := chain.Provider().Client.CallCtx(
+				ctx,
+				eth.CallFunc(custodialRegistrationProxy, systemAcccountGetter).Returns(&systemAccount),
+			)
+			if err != nil {
+				return err
+			}
+			if systemAccount != ethutils.ZeroAddress {
+				if err := cache.Add(ctx, systemAccount.Hex()); err != nil {
+					return err
+				}
+				lo.Debug("cached custodial system account", "address", systemAccount.Hex())
+			}
+		}
+
 		if accountIndex := registryMap[ethutils.AccountIndex]; accountIndex != ethutils.ZeroAddress {
 			if err := cache.Add(ctx, accountIndex.Hex()); err != nil {
 				return err
@@ -103,7 +121,6 @@ func bootstrapCache(
 						if err := cache.Add(ctx, address.Hex()); err != nil {
 							return err
 						}
-
 					}
 				}
 				lo.Debug("cached token index batch", "batch_size", len(tokenIndexBatch))