diff --git a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/api/DeviceListener.kt b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/api/DeviceListener.kt
index c5e2f06..4082483 100644
--- a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/api/DeviceListener.kt
+++ b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/api/DeviceListener.kt
@@ -6,7 +6,6 @@ import hep.dataforge.meta.MetaItem
  * PropertyChangeListener Interface
  * [value] is a new value that property has after a change; null is for invalid state.
  */
-interface PropertyChangeListener {
 interface DeviceListener {
     fun propertyChanged(propertyName: String, value: MetaItem<*>?)
     //TODO add general message listener method
diff --git a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/DeviceMessage.kt b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/DeviceMessage.kt
index 9a5aaa5..f663658 100644
--- a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/DeviceMessage.kt
+++ b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/DeviceMessage.kt
@@ -1,11 +1,9 @@
 package hep.dataforge.control.controllers
 
-import hep.dataforge.control.controlers.DeviceMessage.Companion.PAYLOAD_VALUE_KEY
+import hep.dataforge.control.controllers.DeviceMessage.Companion.PAYLOAD_VALUE_KEY
 import hep.dataforge.meta.*
 import hep.dataforge.names.asName
 import hep.dataforge.names.plus
-import kotlinx.serialization.KSerializer
-import kotlinx.serialization.Serializable
 
 class DeviceMessage : Scheme() {
     var id by item()
diff --git a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/MessageController.kt b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/MessageController.kt
index 2c4a105..ef0eb44 100644
--- a/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/MessageController.kt
+++ b/dataforge-control-core/src/commonMain/kotlin/hep/dataforge/control/controllers/MessageController.kt
@@ -2,9 +2,7 @@ package hep.dataforge.control.controllers
 
 import hep.dataforge.control.api.Device
 import hep.dataforge.control.api.DeviceListener
-import hep.dataforge.control.controlers.DeviceMessage.Companion.PROPERTY_CHANGED_ACTION
-import hep.dataforge.control.api.PropertyChangeListener
-import hep.dataforge.control.controllers.DevicePropertyMessage.Companion.PROPERTY_CHANGED_ACTION
+import hep.dataforge.control.controllers.DeviceMessage.Companion.PROPERTY_CHANGED_ACTION
 import hep.dataforge.io.Envelope
 import hep.dataforge.io.Responder
 import hep.dataforge.io.SimpleEnvelope
diff --git a/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/deviceWebServer.kt b/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/deviceWebServer.kt
index d04baf1..5aa58ea 100644
--- a/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/deviceWebServer.kt
+++ b/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/deviceWebServer.kt
@@ -3,9 +3,9 @@
 package hep.dataforge.control.server
 
 import hep.dataforge.control.api.Device
-import hep.dataforge.control.controlers.DeviceMessage
-import hep.dataforge.control.controlers.MessageController
-import hep.dataforge.control.controlers.property
+import hep.dataforge.control.controllers.DeviceMessage
+import hep.dataforge.control.controllers.MessageController
+import hep.dataforge.control.controllers.property
 import hep.dataforge.meta.toJson
 import hep.dataforge.meta.toMeta
 import hep.dataforge.meta.toMetaItem
diff --git a/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/envelopes.kt b/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/envelopes.kt
index 60c0f1e..095100b 100644
--- a/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/envelopes.kt
+++ b/dataforge-control-server/src/main/kotlin/hep/dataforge/control/server/envelopes.kt
@@ -1,10 +1,9 @@
 package hep.dataforge.control.server
 
-import hep.dataforge.control.controlers.DeviceMessage
+import hep.dataforge.control.controllers.DeviceMessage
 import hep.dataforge.io.Envelope
 import io.ktor.application.ApplicationCall
 import io.ktor.http.cio.websocket.Frame
-import io.ktor.response.ApplicationResponse
 
 fun Frame.toEnvelope(): Envelope {
     TODO()