diff --git a/checkpoints.go b/checkpoints.go
index 3b4f28a..e9de6fc 100644
--- a/checkpoints.go
+++ b/checkpoints.go
@@ -9,7 +9,7 @@ import (
 type Checkpoint interface {
 	CheckpointExists(streamName string, shardID string) bool
 	SequenceNumber() string
-	SetCheckpoint(streamName string, shardId string, sequenceNumber string)
+	SetCheckpoint(streamName string, shardID string, sequenceNumber string)
 }
 
 type RedisCheckpoint struct {
@@ -22,8 +22,8 @@ func (c RedisCheckpoint) SequenceNumber() string {
 	return c.sequenceNumber
 }
 
-func (c *RedisCheckpoint) CheckpointExists(streamName string, shardId string) bool {
-	key := c.keyGen(streamName, shardId)
+func (c *RedisCheckpoint) CheckpointExists(streamName string, shardID string) bool {
+	key := c.keyGen(streamName, shardID)
 	val, _ := c.client.Get(key)
 
 	if val != nil {
@@ -34,12 +34,12 @@ func (c *RedisCheckpoint) CheckpointExists(streamName string, shardId string) bo
 	}
 }
 
-func (c *RedisCheckpoint) SetCheckpoint(streamName string, shardId string, sequenceNumber string) {
-	key := c.keyGen(streamName, shardId)
+func (c *RedisCheckpoint) SetCheckpoint(streamName string, shardID string, sequenceNumber string) {
+	key := c.keyGen(streamName, shardID)
 	c.client.Set(key, []byte(sequenceNumber))
 	c.sequenceNumber = sequenceNumber
 }
 
-func (c RedisCheckpoint) keyGen(streamName string, shardId string) string {
-	return fmt.Sprintf("%v:checkpoint:%v:%v", c.appName, streamName, shardId)
+func (c RedisCheckpoint) keyGen(streamName string, shardID string) string {
+	return fmt.Sprintf("%v:checkpoint:%v:%v", c.appName, streamName, shardID)
 }