diff --git a/op-chain-ops/cmd/celo-migrate/main.go b/op-chain-ops/cmd/celo-migrate/main.go
index c75732a9e9ed9..632ec8dd1587e 100644
--- a/op-chain-ops/cmd/celo-migrate/main.go
+++ b/op-chain-ops/cmd/celo-migrate/main.go
@@ -67,8 +67,9 @@ var (
 		Required: true,
 	}
 	migrationBlockTimeFlag = &cli.Uint64Flag{
-		Name:  "migration-block-time",
-		Usage: "Specifies a unix timestamp to use for the migration block. If not provided, the current time will be used.",
+		Name:     "migration-block-time",
+		Usage:    "Specifies a unix timestamp to use for the migration block. This should be set to the same timestamp as was used for the sequencer migration. If performing the sequencer migration, this should set to a time in the future around when the migration script is expected to complete.",
+		Required: true,
 	}
 	oldDBPathFlag = &cli.PathFlag{
 		Name:     "old-db",
diff --git a/op-chain-ops/cmd/celo-migrate/state.go b/op-chain-ops/cmd/celo-migrate/state.go
index 538486c412382..5c029c8453b03 100644
--- a/op-chain-ops/cmd/celo-migrate/state.go
+++ b/op-chain-ops/cmd/celo-migrate/state.go
@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"math/big"
 	"os"
-	"time"
 
 	"github.com/ethereum-optimism/optimism/op-chain-ops/genesis"
 	"github.com/ethereum-optimism/optimism/op-service/ioutil"
@@ -157,10 +156,6 @@ func applyStateMigrationChanges(config *genesis.DeployConfig, l2Allocs types.Gen
 		return nil, err
 	}
 
-	if migrationBlockTime == 0 {
-		migrationBlockTime = uint64(time.Now().Unix())
-	}
-
 	// Set the standard options.
 	cfg.LondonBlock = migrationBlockNumber
 	cfg.BerlinBlock = migrationBlockNumber