diff --git a/Config.h b/Config.h
index 70b30b32..85d89053 100644
--- a/Config.h
+++ b/Config.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#define NUKI_HUB_VERSION "8.27-pre-1"
+#define NUKI_HUB_VERSION "8.27"
 
 #define MQTT_QOS_LEVEL 1
 #define MQTT_CLEAN_SESSIONS false
diff --git a/Network.cpp b/Network.cpp
index 8bcb0757..18e2e2bd 100644
--- a/Network.cpp
+++ b/Network.cpp
@@ -697,7 +697,7 @@ bool Network::publishString(const char* prefix, const char *topic, const char *v
     return _device->mqttPublish(path, MQTT_QOS_LEVEL, true, value) > 0;
 }
 
-void Network::publishHASSConfig(char* deviceType, const char* baseTopic, char* name, char* uidString, const bool& hasKeypad, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState)
+void Network::publishHASSConfig(char* deviceType, const char* baseTopic, char* name, char* uidString, const char* availabilityTopic, const bool& hasKeypad, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState)
 {
     String discoveryTopic = _preferences->getString(preference_mqtt_hass_discovery);
 
@@ -715,6 +715,7 @@ void Network::publishHASSConfig(char* deviceType, const char* baseTopic, char* n
         json["name"] = nullptr;
         json["unique_id"] = String(uidString) + "_lock";
         json["cmd_t"] = String("~") + String(mqtt_topic_lock_action);
+        json["avty"]["t"] = availabilityTopic;
         json["pl_lock"] = lockAction;
         json["pl_unlk"] = unlockAction;
         json["pl_open"] = openAction;
@@ -1068,7 +1069,7 @@ void Network::publishHASSConfigAccessLog(char *deviceType, const char *baseTopic
                      "diagnostic",
                      "",
                      { { "ic", "mdi:format-list-bulleted" },
-                                      { "value_template", "{{ (value_json|selectattr('type', 'eq', 'LockAction')|selectattr('action', 'in', ['Lock', 'Unlock', 'Unlatch'])|first).authorizationName }}" }});
+                                      { "value_template", "{{ (value_json|selectattr('type', 'eq', 'LockAction')|selectattr('action', 'in', ['Lock', 'Unlock', 'Unlatch'])|first|default).authorizationName|default }}" }});
 }
 
 void Network::publishHASSConfigKeypadAttemptInfo(char *deviceType, const char *baseTopic, char *name, char *uidString)
diff --git a/Network.h b/Network.h
index 71e5faa6..e2c234b8 100644
--- a/Network.h
+++ b/Network.h
@@ -43,7 +43,7 @@ class Network
     void publishBool(const char* prefix, const char* topic, const bool value);
     bool publishString(const char* prefix, const char* topic, const char* value);
 
-    void publishHASSConfig(char* deviceType, const char* baseTopic, char* name, char* uidString, const bool& hasKeypad, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState);
+    void publishHASSConfig(char* deviceType, const char* baseTopic, char* name, char* uidString, const char* availabilityTopic, const bool& hasKeypad, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState);
     void publishHASSConfigBatLevel(char* deviceType, const char* baseTopic, char* name, char* uidString);
     void publishHASSConfigDoorSensor(char* deviceType, const char* baseTopic, char* name, char* uidString, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState);
     void publishHASSConfigRingDetect(char* deviceType, const char* baseTopic, char* name, char* uidString);
diff --git a/NetworkLock.cpp b/NetworkLock.cpp
index e6d5e0f9..c93e933b 100644
--- a/NetworkLock.cpp
+++ b/NetworkLock.cpp
@@ -525,7 +525,7 @@ bool NetworkLock::comparePrefixedPath(const char *fullPath, const char *subPath)
 void NetworkLock::publishHASSConfig(char *deviceType, const char *baseTopic, char *name, char *uidString, const bool& hasDoorSensor, const bool& hasKeypad, const bool& publishAuthData, char *lockAction,
                                char *unlockAction, char *openAction, char *lockedState, char *unlockedState)
 {
-    _network->publishHASSConfig(deviceType, baseTopic, name, uidString, hasKeypad, lockAction, unlockAction, openAction, lockedState, unlockedState);
+    _network->publishHASSConfig(deviceType, baseTopic, name, uidString, "~/maintenance/mqttConnectionState", hasKeypad, lockAction, unlockAction, openAction, lockedState, unlockedState);
     _network->publishHASSConfigBatLevel(deviceType, baseTopic, name, uidString);
     _network->publishHASSConfigLedBrightness(deviceType, baseTopic, name, uidString);
     if(hasDoorSensor)
diff --git a/NetworkOpener.cpp b/NetworkOpener.cpp
index b4c592f3..4f867ac1 100644
--- a/NetworkOpener.cpp
+++ b/NetworkOpener.cpp
@@ -489,7 +489,10 @@ void NetworkOpener::publishBleAddress(const std::string &address)
 
 void NetworkOpener::publishHASSConfig(char* deviceType, const char* baseTopic, char* name, char* uidString, char* lockAction, char* unlockAction, char* openAction, char* lockedState, char* unlockedState)
 {
-    _network->publishHASSConfig(deviceType, baseTopic, name, uidString, false, lockAction, unlockAction, openAction, lockedState, unlockedState);
+    String availabilityTopic = _preferences->getString("mqttpath");
+    availabilityTopic.concat("/maintenance/mqttConnectionState");
+
+    _network->publishHASSConfig(deviceType, baseTopic, name, uidString, availabilityTopic.c_str(), false, lockAction, unlockAction, openAction, lockedState, unlockedState);
     _network->publishHASSConfigRingDetect(deviceType, baseTopic, name, uidString);
     _network->publishHASSConfigSoundLevel(deviceType, baseTopic, name, uidString);
     _network->publishHASSBleRssiConfig(deviceType, baseTopic, name, uidString);
diff --git a/webflash/nuki_hub.bin b/webflash/nuki_hub.bin
index a4b113b1..d1f2ad16 100644
Binary files a/webflash/nuki_hub.bin and b/webflash/nuki_hub.bin differ