diff --git a/api/handler/lifecycle.go b/api/handler/lifecycle.go
index 60bdce09..624859da 100644
--- a/api/handler/lifecycle.go
+++ b/api/handler/lifecycle.go
@@ -160,7 +160,7 @@ func checkLifecycleConfiguration(cfg *data.LifecycleConfiguration) error {
 				return fmt.Errorf("expiration days must be a positive integer: %d", *rule.Expiration.Days)
 			}
 
-			if _, err := time.Parse("2006-01-02T15:04:05.000Z", rule.Expiration.Date); rule.Expiration.Date != "" && err != nil {
+			if _, err := time.Parse("2006-01-02T15:04:05Z", rule.Expiration.Date); rule.Expiration.Date != "" && err != nil {
 				return fmt.Errorf("invalid value of expiration date: %s", rule.Expiration.Date)
 			}
 		}