diff --git a/README.md b/README.md
index 469ce3e..819d246 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,9 @@ If any error occurs, please set the adapter loglevel to debug and send me the da
 If this project helped you to reduce developing time, you can give me a cup of coffee or a bottle of beer via PayPal(chvorholt@gmail.com) :-)  
 
 ## Changelog
+#### 2.1.3 (27-Jun-2019)
+- compatibility for boolean values and old Wiffi versions
+
 #### 2.1.2 (21-Jun-2019)
 - changed behaviour: if states are missing in the datagram, but present in the database, they are not removed from the database
 - boolean and numeric values are correctly stored
diff --git a/io-package.json b/io-package.json
index cb85c15..26fac10 100644
--- a/io-package.json
+++ b/io-package.json
@@ -1,8 +1,20 @@
 {
     "common": {
         "name":                     "wiffi-wz",
-        "version":                  "2.1.2",
+        "version":                  "2.1.3",
         "news": {
+          "2.1.3": {
+            "en": "compatibility for boolean values and old Wiffi versions",
+            "de": "Kompatibilität für Boolesche Werte und alte Wiffi-Versionen",
+            "ru": "совместимость для логических значений и старых версий Wiffi",
+            "pt": "compatibilidade para valores booleanos e versões antigas do Wiffi",
+            "nl": "compatibiliteit voor booleaanse waarden en oude Wiffi-versies",
+            "fr": "Compatibilité pour les valeurs booléennes et les anciennes versions de Wiffi",
+            "it": "compatibilità per valori booleani e vecchie versioni di Wiffi",
+            "es": "Compatibilidad con valores booleanos y versiones anteriores de Wiffi.",
+            "pl": "zgodność dla wartości logicznych i starych wersji Wiffi",
+            "zh-cn": "兼容布尔值和旧Wiffi版本"
+          },
           "2.1.2": {
             "en": "boolean values are correctly saved",
             "de": "Boolesche Werte werden korrekt gespeichert",
diff --git a/main.js b/main.js
index 6f14deb..aa0682e 100644
--- a/main.js
+++ b/main.js
@@ -622,7 +622,11 @@ function cast_wiffi_value(wiffi_val, wiffi_type) {
   let val;
   switch (wiffi_type) {
     case 'boolean':
-      val = ((wiffi_val === 'true') ? true : false);
+      if(typeof wiffi_val === 'boolean') {
+        val = wiffi_val;
+      } else {
+        val = (wiffi_val === 'true');
+      }
       break;
     case 'number':
       val = Number(wiffi_val);
diff --git a/package.json b/package.json
index 1755447..be884db 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "iobroker.wiffi-wz",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "description": "Wiffi-wz Adapter",
   "author": {
     "name": "Christian Vorholt",