diff --git a/events/firehose.go b/events/firehose.go
index 80ce098e..aace0cff 100644
--- a/events/firehose.go
+++ b/events/firehose.go
@@ -39,6 +39,6 @@ type KinesisFirehoseRecordMetadata struct {
 	ShardID                     string                `json:"shardId"`
 	PartitionKey                string                `json:"partitionKey"`
 	SequenceNumber              string                `json:"sequenceNumber"`
-	SubsequenceNumber           string                `json:"subsequenceNumber"`
+	SubsequenceNumber           int64                 `json:"subsequenceNumber"`
 	ApproximateArrivalTimestamp MilliSecondsEpochTime `json:"approximateArrivalTimestamp"`
 }
diff --git a/events/testdata/kinesis-firehose-event.json b/events/testdata/kinesis-firehose-event.json
index e57977ce..0a9c00dc 100644
--- a/events/testdata/kinesis-firehose-event.json
+++ b/events/testdata/kinesis-firehose-event.json
@@ -13,7 +13,7 @@
          "partitionKey": "4d1ad2b9-24f8-4b9d-a088-76e9947c317a",
          "approximateArrivalTimestamp": 1507217624302,
          "sequenceNumber": "49546986683135544286507457936321625675700192471156785154",
-         "subsequenceNumber": "123456"
+         "subsequenceNumber": 123456
        }
      },
      {
@@ -25,7 +25,7 @@
          "partitionKey": "4d1ad2b9-24f8-4b9d-a088-76e9947c318a",
          "approximateArrivalTimestamp": 1507217624302,
          "sequenceNumber": "49546986683135544286507457936321625675700192471156785155",
-         "subsequenceNumber": "123457"
+         "subsequenceNumber": 123457
        }
      }
    ]
diff --git a/events/testdata/kinesis-firehose-response.json b/events/testdata/kinesis-firehose-response.json
index b7697a5f..04cb7d4b 100644
--- a/events/testdata/kinesis-firehose-response.json
+++ b/events/testdata/kinesis-firehose-response.json
@@ -11,4 +11,4 @@
        "result": "TRANSFORMED_STATE_DROPPED"
      }
    ]
- }
\ No newline at end of file
+ }