diff --git a/app/build.gradle b/app/build.gradle
index 10cba6a..9b60148 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "com.github.axet.audiorecorder"
         minSdkVersion 9
         targetSdkVersion 23
-        versionCode 133
-        versionName "1.5.4"
+        versionCode 134
+        versionName "1.5.5"
     }
     signingConfigs {
         release {
diff --git a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
index ac72eef..b22ef2a 100644
--- a/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
+++ b/app/src/main/java/com/github/axet/audiorecorder/activities/RecordingActivity.java
@@ -12,6 +12,7 @@ import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.media.AudioFormat;
 import android.media.AudioRecord;
+import android.media.AudioTrack;
 import android.media.MediaRecorder;
 import android.os.Build;
 import android.os.Bundle;
@@ -34,7 +35,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import com.github.axet.androidlibrary.animations.MarginBottomAnimation;
-import com.github.axet.androidlibrary.app.AudioTrack;
 import com.github.axet.audiolibrary.app.RawSamples;
 import com.github.axet.audiolibrary.app.Sound;
 import com.github.axet.audiolibrary.app.Storage;