diff --git a/bower.json b/bower.json
index b024bd7..d801d3e 100644
--- a/bower.json
+++ b/bower.json
@@ -1,7 +1,7 @@
 {
   "name": "strolch-wc-plc",
   "description": "Strolch PLC WebComponents",
-  "version": "0.2.1",
+  "version": "0.3.0",
   "authors": ["Robert von Burg"],
   "keywords": [
     "strolch",
@@ -17,11 +17,11 @@
   "homepage": "https://github.com/4treesCH/strolch-wc-plc",
   "ignore": [],
   "dependencies": {
-    "strolchjs": "4treesCH/strolchjs#^0.2.7",
+    "strolchjs": "4treesCH/strolchjs#^0.2.8",
     "strolch-wc-styles": "4treesCH/strolch-wc-styles#^0.3.0",
     "strolch-wc-debounced-input": "4treesCH/strolch-wc-debounced-input#^0.1.0",
     "strolch-wc-tree": "4treesCH/strolch-wc-tree#^0.1.5",
-    "strolch-wc-ws-observer": "4treesCH/strolch-wc-ws-observer#^0.1.5",
+    "strolch-wc-ws-observer": "4treesCH/strolch-wc-ws-observer#^0.2.0",
     "strolch-wc-localize-behavior": "4treesCH/strolch-wc-localize-behavior#^1.1.4",
 
     "polymer": "Polymer/polymer#^1.11.3",
diff --git a/strolch-wc-plc-logical-devices.html b/strolch-wc-plc-logical-devices.html
index 6c9822b..c6bbd16 100644
--- a/strolch-wc-plc-logical-devices.html
+++ b/strolch-wc-plc-logical-devices.html
@@ -67,7 +67,7 @@
                    on-response="onGetDevicesResponse"
                    on-error="onRequestError"></iron-ajax>
 
-        <strolch-wc-ws-observer id="observerHandler" ws-path="[[wsObserverPath]]"></strolch-wc-ws-observer>
+        <strolch-wc-ws-observer id="observerHandler" ws-path="[[baseWsPath]]/plc/observer"></strolch-wc-ws-observer>
 
     </template>
 
@@ -99,12 +99,6 @@
                 devicesByGroup: {
                     type: Array,
                     value: []
-                },
-                wsObserverPath: {
-                    type: String,
-                    value: function () {
-                        return CustomWeb.baseWsPath + "/plc/observer";
-                    }
                 }
             },
 
@@ -118,7 +112,7 @@
                 this.$.ajaxGetDevices.generateRequest();
 
                 if (!this.registeredForUpdates) {
-                    this.$.observerHandler.register("Resource", "PlcAddress", "strolch-wc-plc-logical-devices", true, this.handleUpdate.bind(this));
+                    this.$.observerHandler.register("Resource", "PlcAddress", "strolch-wc-plc-logical-devices", {flat: true}, this.handleUpdate.bind(this));
                     this.registeredForUpdates = true;
                 }
             },