diff --git a/dfu/build.gradle b/dfu/build.gradle
index fab5139..818361b 100644
--- a/dfu/build.gradle
+++ b/dfu/build.gradle
@@ -8,7 +8,7 @@ ext {
 
 android {
     compileSdkVersion 22
-    buildToolsVersion '22.0.0'
+    buildToolsVersion '22.0.1'
 
     defaultConfig {
         minSdkVersion 18
@@ -26,7 +26,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-v4:22.0.0'
+    compile 'com.android.support:support-v4:22.1.1'
     compile 'com.google.code.gson:gson:2.3.1'
 }
 
diff --git a/dfu/dfu.iml b/dfu/dfu.iml
index 7763777..6c1988d 100644
--- a/dfu/dfu.iml
+++ b/dfu/dfu.iml
@@ -87,8 +87,8 @@
     <orderEntry type="jdk" jdkName="Android API 22 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" exported="" name="gson-2.3.1" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-22.0.0" level="project" />
-    <orderEntry type="library" exported="" name="support-annotations-22.0.0" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-22.1.1" level="project" />
+    <orderEntry type="library" exported="" name="support-annotations-22.1.1" level="project" />
   </component>
 </module>
 
diff --git a/dfu/src/main/java/no/nordicsemi/android/error/GattError.java b/dfu/src/main/java/no/nordicsemi/android/error/GattError.java
index 3ceca4c..a084327 100644
--- a/dfu/src/main/java/no/nordicsemi/android/error/GattError.java
+++ b/dfu/src/main/java/no/nordicsemi/android/error/GattError.java
@@ -135,12 +135,16 @@ public class GattError {
 				return "GATT ENCRYPTED NO MITM";
 			case 0x008e:
 				return "GATT NOT ENCRYPTED";
-			case 0x01FF:
+			case 0x008f:
+				return "GATT CONGESTED";
+			case 0x00FD:
+				return "GATT CCCD CFG ERROR";
+			case 0x00FE:
+				return "GATT PROCEDURE IN PROGRESS";
+			case 0x00FF:
 				return "GATT VALUE OUT OF RANGE";
 			case 0x0101:
 				return "TOO MANY OPEN CONNECTIONS";
-			case 0x00FF:
-				return "DFU SERVICE DISCOVERY NOT STARTED";
 			case DfuBaseService.ERROR_DEVICE_DISCONNECTED:
 				return "DFU DEVICE DISCONNECTED";
 			case DfuBaseService.ERROR_FILE_ERROR:
@@ -152,7 +156,7 @@ public class GattError {
 			case DfuBaseService.ERROR_FILE_NOT_FOUND:
 				return "DFU FILE NOT FOUND";
 			case DfuBaseService.ERROR_SERVICE_DISCOVERY_NOT_STARTED:
-				return "DFU ERROR WHILE SERVICE DISCOVERY";
+				return "DFU SERVICE DISCOVERY NOT STARTED";
 			case DfuBaseService.ERROR_SERVICE_NOT_FOUND:
 				return "DFU SERVICE NOT FOUND";
 			case DfuBaseService.ERROR_CHARACTERISTICS_NOT_FOUND: