diff --git a/README.md b/README.md
index 5dec0e1..40becf0 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Add the dependency to the **Module** gradle file:
 ```gradle
 dependencies {
 	...
-	compile 'com.github.phearme:bt-scan-selector:1.1.4'
+	compile 'com.github.phearme:bt-scan-selector:1.1.5'
 }
 ```
 Enable databinding in the **Module** grade file:
diff --git a/btscanselector/build.gradle b/btscanselector/build.gradle
index 62c5502..7583688 100644
--- a/btscanselector/build.gradle
+++ b/btscanselector/build.gradle
@@ -7,8 +7,8 @@ android {
     defaultConfig {
         minSdkVersion 14
         targetSdkVersion 26
-        versionCode 17
-        versionName "1.1.4"
+        versionCode 18
+        versionName "1.1.5"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
diff --git a/btscanselector/src/main/java/com/phearme/btscanselector/BTScanSelectorViewModel.java b/btscanselector/src/main/java/com/phearme/btscanselector/BTScanSelectorViewModel.java
index ca0e9cd..2949446 100644
--- a/btscanselector/src/main/java/com/phearme/btscanselector/BTScanSelectorViewModel.java
+++ b/btscanselector/src/main/java/com/phearme/btscanselector/BTScanSelectorViewModel.java
@@ -68,7 +68,9 @@ public void onReceive(Context context, Intent intent) {
         filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
         filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
         context.registerReceiver(mReceiver, filter);
-        BluetoothAdapter.getDefaultAdapter().startDiscovery();
+        if (BluetoothAdapter.getDefaultAdapter() != null) {
+            BluetoothAdapter.getDefaultAdapter().startDiscovery();
+        }
     }
 
     @Bindable
@@ -99,7 +101,9 @@ public void onItemResultClick(BTScanResultItem device) {
 
     void terminate(Context context) {
         try {
-            BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
+            if (BluetoothAdapter.getDefaultAdapter() != null) {
+                BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
+            }
             if (mReceiver != null) {
                 context.unregisterReceiver(mReceiver);
             }
@@ -118,7 +122,9 @@ public int compare(BTScanResultItem btScanResultItem, BTScanResultItem t1) {
     void refresh() {
         if (!isScanning()) {
             devices = new ArrayList<>();
-            BluetoothAdapter.getDefaultAdapter().startDiscovery();
+            if (BluetoothAdapter.getDefaultAdapter() != null) {
+                BluetoothAdapter.getDefaultAdapter().startDiscovery();
+            }
         }
     }