diff --git a/usecase/device_details.go b/usecase/device_details.go
index b34f4c5..2bcd2ff 100644
--- a/usecase/device_details.go
+++ b/usecase/device_details.go
@@ -56,7 +56,7 @@ func NewDeviceDetailsUseCase(deviceDetailsRepo repository.DeviceDetailsRepo, geo
 
 func (u *deviceDetailsUseCase) GetDevicesWithoutConnections(deviceTypes []string) ([]res.DeviceDetailsResponse, error) {
     // Validate device types
-    validTypes := map[string]bool{"closure": true, "OTB": true}
+    validTypes := map[string]bool{"CLOSURE": true, "OTB": true}
     for _, deviceType := range deviceTypes {
         if !validTypes[deviceType] {
             return nil, fmt.Errorf("invalid device type: %s. Only closure and OTB are allowed", deviceType)
@@ -65,7 +65,7 @@ func (u *deviceDetailsUseCase) GetDevicesWithoutConnections(deviceTypes []string
     
     // If no device types provided, default to closure and OTB
     if len(deviceTypes) == 0 {
-        deviceTypes = []string{"closure", "OTB"}
+        deviceTypes = []string{"CLOSURE", "OTB"}
     }
     
     devices, err := u.deviceDetailsRepo.GetDevicesWithoutConnections(deviceTypes)