diff --git a/.changelog/1249.txt b/.changelog/1249.txt
new file mode 100644
index 00000000000..362b4726b1a
--- /dev/null
+++ b/.changelog/1249.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+service_mode_v2: update `Mode` field to use new `ServiceMode` string type with explicit const service mode values
+```
diff --git a/devices_policy.go b/devices_policy.go
index 2e537757e15..2664a260c74 100644
--- a/devices_policy.go
+++ b/devices_policy.go
@@ -17,9 +17,19 @@ type DeviceClientCertificatesZone struct {
 	Result Enabled
 }
 
+type ServiceMode string
+
+const (
+	oneDotOne      ServiceMode = "1dot1"
+	warp           ServiceMode = "warp"
+	proxy          ServiceMode = "proxy"
+	postureOnly    ServiceMode = "posture_only"
+	warpTunnelOnly ServiceMode = "warp_tunnel_only"
+)
+
 type ServiceModeV2 struct {
-	Mode string `json:"mode,omitempty"`
-	Port int    `json:"port,omitempty"`
+	Mode ServiceMode `json:"mode,omitempty"`
+	Port int         `json:"port,omitempty"`
 }
 
 type DeviceSettingsPolicy struct {