diff --git a/BleKeyboard.cpp b/BleKeyboard.cpp
index 48a8930..76c4ffa 100644
--- a/BleKeyboard.cpp
+++ b/BleKeyboard.cpp
@@ -95,10 +95,10 @@ static const uint8_t _hidReportDescriptor[] = {
   END_COLLECTION(0)                  // END_COLLECTION
 };
 
-BleKeyboard::BleKeyboard(std::string deviceName, std::string deviceManufacturer, uint8_t batteryLevel) 
+BleKeyboard::BleKeyboard(String deviceName, String deviceManufacturer, uint8_t batteryLevel) 
     : hid(0)
-    , deviceName(std::string(deviceName).substr(0, 15))
-    , deviceManufacturer(std::string(deviceManufacturer).substr(0,15))
+    , deviceName(String(deviceName).substring(0, 15))
+    , deviceManufacturer(String(deviceManufacturer).substring(0,15))
     , batteryLevel(batteryLevel) {}
 
 void BleKeyboard::begin(void)
@@ -161,7 +161,7 @@ void BleKeyboard::setBatteryLevel(uint8_t level) {
 }
 
 //must be called before begin in order to set the name
-void BleKeyboard::setName(std::string deviceName) {
+void BleKeyboard::setName(String deviceName) {
   this->deviceName = deviceName;
 }
 
@@ -468,7 +468,6 @@ void BleKeyboard::releaseAll(void)
     _mediaKeyReport[0] = 0;
     _mediaKeyReport[1] = 0;
 	sendReport(&_keyReport);
-	sendReport(&_mediaKeyReport);
 }
 
 size_t BleKeyboard::write(uint8_t c)
@@ -544,4 +543,4 @@ void BleKeyboard::delay_ms(uint64_t ms) {
     }
     while(esp_timer_get_time() < e) {}
   }
-}
+}
\ No newline at end of file
diff --git a/BleKeyboard.h b/BleKeyboard.h
index 0736a02..1d1ce07 100644
--- a/BleKeyboard.h
+++ b/BleKeyboard.h
@@ -138,8 +138,8 @@ class BleKeyboard : public Print, public BLEServerCallbacks, public BLECharacter
   BLEAdvertising*    advertising;
   KeyReport          _keyReport;
   MediaKeyReport     _mediaKeyReport;
-  std::string        deviceName;
-  std::string        deviceManufacturer;
+  String        deviceName;
+  String        deviceManufacturer;
   uint8_t            batteryLevel;
   bool               connected = false;
   uint32_t           _delay_ms = 7;
@@ -150,7 +150,7 @@ class BleKeyboard : public Print, public BLEServerCallbacks, public BLECharacter
   uint16_t version   = 0x0210;
 
 public:
-  BleKeyboard(std::string deviceName = "ESP32 Keyboard", std::string deviceManufacturer = "Espressif", uint8_t batteryLevel = 100);
+  BleKeyboard(String deviceName = "ESP32 Keyboard", String deviceManufacturer = "Espressif", uint8_t batteryLevel = 100);
   void begin(void);
   void end(void);
   void sendReport(KeyReport* keys);
@@ -165,7 +165,7 @@ class BleKeyboard : public Print, public BLEServerCallbacks, public BLECharacter
   void releaseAll(void);
   bool isConnected(void);
   void setBatteryLevel(uint8_t level);
-  void setName(std::string deviceName);  
+  void setName(String deviceName);  
   void setDelay(uint32_t ms);
 
   void set_vendor_id(uint16_t vid);
diff --git a/library.properties b/library.properties
index 263a10f..19cf838 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ESP32 BLE Keyboard
-version=0.3.2
+version=0.3.4
 author=T-vK
 maintainer=T-vK
 sentence=Bluetooth LE Keyboard library for the ESP32.