diff --git a/cmd/sentinel/cpu.go b/cmd/sentinel/cpu.go
index d6188d5..87c5fce 100644
--- a/cmd/sentinel/cpu.go
+++ b/cmd/sentinel/cpu.go
@@ -11,7 +11,7 @@ import (
 	"github.com/shirou/gopsutil/cpu"
 )
 
-var cpuCsvHeader = "time,percent\n"
+var cpuCsvHeader = "time,usage_percent\n"
 
 type CpuUsage struct {
 	Time string `json:"time"`
diff --git a/cmd/sentinel/disk.go b/cmd/sentinel/disk.go
index 2946697..18f7de9 100644
--- a/cmd/sentinel/disk.go
+++ b/cmd/sentinel/disk.go
@@ -21,7 +21,7 @@ type DiskUsage struct {
 	Usage      string `json:"usage"`
 }
 
-var diskCsvHeader = "time,disk,mount_point,total,free,usagePercent\n"
+var diskCsvHeader = "time,disk,mount_point,total,free,usage_percent\n"
 
 func getDiskUsage(csv bool) (string, error) {
 	partitions, err := disk.Partitions(true)
diff --git a/cmd/sentinel/memory.go b/cmd/sentinel/memory.go
index a0546a3..ef98281 100644
--- a/cmd/sentinel/memory.go
+++ b/cmd/sentinel/memory.go
@@ -11,7 +11,7 @@ import (
 	"github.com/shirou/gopsutil/mem"
 )
 
-var memoryCsvHeader = "time,used,free,usedPercent\n"
+var memoryCsvHeader = "time,used,free,used_percent\n"
 
 type MemUsage struct {
 	Time        string  `json:"time"`