diff --git a/vendor/github.com/Shopify/sarama/produce_set.go b/vendor/github.com/Shopify/sarama/produce_set.go
index bba0f7e..b684aa4 100644
--- a/vendor/github.com/Shopify/sarama/produce_set.go
+++ b/vendor/github.com/Shopify/sarama/produce_set.go
@@ -44,9 +44,10 @@
 	}
 
 	timestamp := msg.Timestamp
-	if msg.Timestamp.IsZero() {
+	if timestamp.IsZero() {
 		timestamp = time.Now()
 	}
+	timestamp = timestamp.Truncate(time.Millisecond)
 
 	partitions := ps.msgs[msg.Topic]
 	if partitions == nil {