diff --git a/app/build.gradle b/app/build.gradle
index 383ba374f..f7e436972 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -93,8 +93,6 @@ dependencies {
     implementation 'androidx.test:core:1.4.0'
     implementation 'androidx.test:runner:1.4.0'
     implementation 'com.google.code.gson:gson:2.10.1'
-    //noinspection GradleDependency
-    implementation 'commons-io:commons-io:2.6'
     implementation 'io.netty:netty-all:4.0.41.Final'
     implementation 'net.gcardone.junidecode:junidecode:0.4.1'
     // The next three dependencies are required for XPath search to work
diff --git a/app/src/main/java/io/appium/uiautomator2/core/AccessibilityNodeInfoDumper.java b/app/src/main/java/io/appium/uiautomator2/core/AccessibilityNodeInfoDumper.java
index 2818a0261..fe71157ac 100644
--- a/app/src/main/java/io/appium/uiautomator2/core/AccessibilityNodeInfoDumper.java
+++ b/app/src/main/java/io/appium/uiautomator2/core/AccessibilityNodeInfoDumper.java
@@ -27,7 +27,6 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
-import org.apache.commons.io.IOUtils;
 import org.apache.xerces.jaxp.DocumentBuilderFactoryImpl;
 import org.eclipse.wst.xml.xpath2.api.Item;
 import org.eclipse.wst.xml.xpath2.api.ResultSequence;
@@ -48,6 +47,7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.charset.Charset;
 import java.util.Iterator;
 import java.util.Objects;
 import java.util.Set;
@@ -244,7 +244,7 @@ public String dumpToXml() {
             throw new UiAutomator2Exception(e);
         }
         try (InputStream xmlStream = toStream(false)) {
-            return IOUtils.toString(xmlStream, XML_ENCODING);
+            return StringHelpers.inputStreamToString(xmlStream, Charset.forName(XML_ENCODING));
         } catch (IOException e) {
             throw new UiAutomator2Exception(e);
         } finally {
diff --git a/app/src/main/java/io/appium/uiautomator2/utils/ScreenshotHelper.java b/app/src/main/java/io/appium/uiautomator2/utils/ScreenshotHelper.java
index aeccebf39..260fc5294 100644
--- a/app/src/main/java/io/appium/uiautomator2/utils/ScreenshotHelper.java
+++ b/app/src/main/java/io/appium/uiautomator2/utils/ScreenshotHelper.java
@@ -28,8 +28,6 @@
 
 import androidx.annotation.Nullable;
 
-import org.apache.commons.io.IOUtils;
-
 import java.io.ByteArrayOutputStream;
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -95,7 +93,7 @@ private static <T> T takeDeviceScreenshot(Class<T> outputType) throws TakeScreen
             try {
                 ParcelFileDescriptor pfd = automation.executeShellCommand("screencap -p");
                 try (InputStream is = new FileInputStream(pfd.getFileDescriptor())) {
-                    byte[] pngBytes = IOUtils.toByteArray(is);
+                    byte[] pngBytes = StringHelpers.inputStreamToByteArray(is);
                     if (pngBytes.length <= PNG_MAGIC_LENGTH) {
                         throw new IllegalStateException("screencap returned an invalid response");
                     }
diff --git a/app/src/main/java/io/appium/uiautomator2/utils/StringHelpers.java b/app/src/main/java/io/appium/uiautomator2/utils/StringHelpers.java
index 6504c034e..e715d8c8c 100644
--- a/app/src/main/java/io/appium/uiautomator2/utils/StringHelpers.java
+++ b/app/src/main/java/io/appium/uiautomator2/utils/StringHelpers.java
@@ -19,7 +19,15 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.Charset;
+
 public class StringHelpers {
+    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
+    private static final int EOF = -1;
+
     public static String abbreviate(@Nullable String str, int maxLen) {
         if (str == null) {
             return null;
@@ -68,8 +76,27 @@ public static String pluralize(long count, String singularWord) {
     @NonNull
     public static String pluralize(long count, String singularWord, boolean includeCount) {
         if (count == 1) {
-            return includeCount ? String.format("%s %s", count, singularWord) : String.valueOf(singularWord);
+            return includeCount
+                    ? String.format("%s %s", count, singularWord)
+                    : String.valueOf(singularWord);
         }
-        return includeCount ? String.format("%s %ss", count, singularWord) : String.format("%ss", singularWord);
+        return includeCount
+                ? String.format("%s %ss", count, singularWord)
+                : String.format("%ss", singularWord);
+    }
+
+    public static byte[] inputStreamToByteArray(InputStream input) throws IOException {
+        try (ByteArrayOutputStream result = new ByteArrayOutputStream()) {
+            byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
+            int length;
+            while ((length = input.read(buffer)) != EOF) {
+                result.write(buffer, 0, length);
+            }
+            return result.toByteArray();
+        }
+    }
+
+    public static String inputStreamToString(InputStream input, Charset encoding) throws IOException {
+        return new String(inputStreamToByteArray(input), encoding);
     }
 }