diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2731f496..eb4e4533 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -51,7 +51,7 @@ yarn test
 
 To edit the Objective-C files, open `example/ios/MmkvExample.xcworkspace` in XCode and find the source files at `Pods > Development Pods > react-native-mmkv`.
 
-To edit the Kotlin files, open `example/android` in Android studio and find the source files at `reactnativemmkv` under `Android`.
+To edit the Java files, open `example/android` in Android studio and find the source files at `reactnativemmkv` under `Android`.
 
 ### Commit message convention
 
diff --git a/android/build.gradle b/android/build.gradle
index 24bd4329..f2678910 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -1,7 +1,4 @@
 buildscript {
-  // Buildscript is evaluated before everything else so we can't use getExtOrDefault
-  def kotlin_version = rootProject.ext.has('kotlinVersion') ? rootProject.ext.get('kotlinVersion') : project.properties['Mmkv_kotlinVersion']
-
   repositories {
     google()
     jcenter()
@@ -9,13 +6,10 @@ buildscript {
 
   dependencies {
     classpath 'com.android.tools.build:gradle:3.2.1'
-    // noinspection DifferentKotlinGradleVersion
-    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
   }
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
 
 def getExtOrDefault(name) {
   return rootProject.ext.has(name) ? rootProject.ext.get(name) : project.properties['Mmkv_' + name]
@@ -134,10 +128,7 @@ repositories {
   }
 }
 
-def kotlin_version = getExtOrDefault('kotlinVersion')
-
 dependencies {
   // noinspection GradleDynamicVersion
   api 'com.facebook.react:react-native:+'
-  implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }
diff --git a/android/gradle.properties b/android/gradle.properties
index 492ee55a..98bc617d 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -1,4 +1,3 @@
-Mmkv_kotlinVersion=1.3.50
 Mmkv_compileSdkVersion=29
 Mmkv_buildToolsVersion=29.0.2
 Mmkv_targetSdkVersion=29
diff --git a/android/src/main/java/com/reactnativemmkv/MmkvModule.java b/android/src/main/java/com/reactnativemmkv/MmkvModule.java
new file mode 100644
index 00000000..c6e84fbc
--- /dev/null
+++ b/android/src/main/java/com/reactnativemmkv/MmkvModule.java
@@ -0,0 +1,34 @@
+package com.reactnativemmkv;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+
+public class MmkvModule extends ReactContextBaseJavaModule {
+  static {
+    System.loadLibrary("cpp");
+  }
+
+  private native void nativeInstall(long jsiPtr, String path);
+
+  public MmkvModule(ReactApplicationContext context) {
+    super(context);
+  }
+
+  @NonNull
+  @Override
+  public String getName() {
+    return "MMKV";
+  }
+
+  @Override
+  public void initialize() {
+    super.initialize();
+
+    nativeInstall(
+      this.getReactApplicationContext().getJavaScriptContextHolder().get(),
+      this.getReactApplicationContext().getFilesDir().getAbsolutePath() + "/mmkv"
+    );
+  }
+}
diff --git a/android/src/main/java/com/reactnativemmkv/MmkvModule.kt b/android/src/main/java/com/reactnativemmkv/MmkvModule.kt
deleted file mode 100644
index aaf871cb..00000000
--- a/android/src/main/java/com/reactnativemmkv/MmkvModule.kt
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.reactnativemmkv
-
-import com.facebook.react.bridge.ReactApplicationContext
-import com.facebook.react.bridge.ReactContextBaseJavaModule
-
-class MmkvModule(reactContext: ReactApplicationContext) : ReactContextBaseJavaModule(reactContext) {
-  override fun getName(): String {
-      return "MMKV"
-  }
-
-  private external fun nativeInstall(jsiPtr: Long, path: String);
-
-  companion object
-  {
-      init
-      {
-          System.loadLibrary("cpp")
-      }
-  }
-
-  override fun initialize() {
-    super.initialize()
-
-    nativeInstall(
-      this.reactApplicationContext.javaScriptContextHolder.get(),
-      this.reactApplicationContext.filesDir.absolutePath + "/mmkv")
-  }
-}
diff --git a/android/src/main/java/com/reactnativemmkv/MmkvPackage.java b/android/src/main/java/com/reactnativemmkv/MmkvPackage.java
new file mode 100644
index 00000000..8b376b64
--- /dev/null
+++ b/android/src/main/java/com/reactnativemmkv/MmkvPackage.java
@@ -0,0 +1,26 @@
+package com.reactnativemmkv;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.Collections;
+import java.util.List;
+
+
+public class MmkvPackage implements ReactPackage {
+  @NonNull
+  @Override
+  public List<NativeModule> createNativeModules(@NonNull ReactApplicationContext reactContext) {
+    return Collections.singletonList(new MmkvModule(reactContext));
+  }
+
+  @NonNull
+  @Override
+  public List<ViewManager> createViewManagers(@NonNull ReactApplicationContext reactContext) {
+    return null;
+  }
+}
diff --git a/android/src/main/java/com/reactnativemmkv/MmkvPackage.kt b/android/src/main/java/com/reactnativemmkv/MmkvPackage.kt
deleted file mode 100644
index 74669f74..00000000
--- a/android/src/main/java/com/reactnativemmkv/MmkvPackage.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.reactnativemmkv
-
-import com.facebook.react.ReactPackage
-import com.facebook.react.bridge.NativeModule
-import com.facebook.react.bridge.ReactApplicationContext
-import com.facebook.react.uimanager.ViewManager
-
-
-class MmkvPackage : ReactPackage {
-    override fun createNativeModules(reactContext: ReactApplicationContext): List<NativeModule> {
-        return listOf(MmkvModule(reactContext))
-    }
-
-    override fun createViewManagers(reactContext: ReactApplicationContext): List<ViewManager<*, *>> {
-        return emptyList()
-    }
-}