diff --git a/README.md b/README.md
index 8a7ed6a..16a5ad0 100644
--- a/README.md
+++ b/README.md
@@ -339,7 +339,7 @@ Prints a EAN8 barcode (height: 10mm, width: ~70% printer width, text: displayed
 Prints a UPC-A barcode (height: 20mm, width: ~70% printer width, text: displayed below).
 - `<barcode type='upce' height='25' width='50' text='none'>512789</barcode>` : **(6 numbers)**  
 Prints a UPC-E barcode (height: 25mm, width: ~50mm, text: hidden).
-- `<barcode type='128' width='40' text='above'>DantSu</barcode>` :
+- `<barcode type='128' width='40' text='above'>DantSu</barcode>` : **(string)**  
 Prints a barcode 128 (height: 10mm, width: ~40mm, text: displayed above).
 
 **⚠ WARNING ⚠** : This tag has several constraints :
diff --git a/escposprinter/README.md b/escposprinter/README.md
index 8a7ed6a..16a5ad0 100644
--- a/escposprinter/README.md
+++ b/escposprinter/README.md
@@ -339,7 +339,7 @@ Prints a EAN8 barcode (height: 10mm, width: ~70% printer width, text: displayed
 Prints a UPC-A barcode (height: 20mm, width: ~70% printer width, text: displayed below).
 - `<barcode type='upce' height='25' width='50' text='none'>512789</barcode>` : **(6 numbers)**  
 Prints a UPC-E barcode (height: 25mm, width: ~50mm, text: hidden).
-- `<barcode type='128' width='40' text='above'>DantSu</barcode>` :
+- `<barcode type='128' width='40' text='above'>DantSu</barcode>` : **(string)**  
 Prints a barcode 128 (height: 10mm, width: ~40mm, text: displayed above).
 
 **⚠ WARNING ⚠** : This tag has several constraints :
diff --git a/escposprinter/src/main/java/com/dantsu/escposprinter/EscPosPrinterCommands.java b/escposprinter/src/main/java/com/dantsu/escposprinter/EscPosPrinterCommands.java
index 12f45f6..c3d6b2c 100644
--- a/escposprinter/src/main/java/com/dantsu/escposprinter/EscPosPrinterCommands.java
+++ b/escposprinter/src/main/java/com/dantsu/escposprinter/EscPosPrinterCommands.java
@@ -350,7 +350,7 @@ public EscPosPrinterCommands printBarcode(Barcode barcode) {
      * @param size       dot size of QR code pixel
      * @return Fluent interface
      */
-    public EscPosPrinterCommands printQRCode(int qrCodeType, String text, int size) {
+    public EscPosPrinterCommands printQRCode(int qrCodeType, String text, int size) throws EscPosEncodingException {
         if (!this.printerConnection.isConnected()) {
             return this;
         }
@@ -387,6 +387,7 @@ public EscPosPrinterCommands printQRCode(int qrCodeType, String text, int size)
             this.printerConnection.write(new byte[]{0x1D, 0x28, 0x6B, 0x03, 0x00, 0x31, 0x51, 0x30});
         } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
+            throw new EscPosEncodingException(e.getMessage());
         }
         return this;
     }