diff --git a/ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java b/ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java
index c2b3ecf71d1..e92d4198582 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/ReactInstanceManagerBuilder.java
@@ -2,14 +2,8 @@
 
 package com.facebook.react;
 
-import javax.annotation.Nullable;
-
-import java.util.ArrayList;
-import java.util.List;
-
 import android.app.Activity;
 import android.app.Application;
-
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.bridge.JSBundleLoader;
 import com.facebook.react.bridge.NativeModuleCallExceptionHandler;
@@ -20,34 +14,37 @@ import com.facebook.react.devsupport.interfaces.DevBundleDownloadListener;
 import com.facebook.react.devsupport.interfaces.DevSupportManager;
 import com.facebook.react.modules.core.DefaultHardwareBackBtnHandler;
 import com.facebook.react.uimanager.UIImplementationProvider;
+import java.util.ArrayList;
+import java.util.List;
+import javax.annotation.Nullable;
 
 /**
  * Builder class for {@link ReactInstanceManager}
  */
 public class ReactInstanceManagerBuilder {
 
-  protected final List<ReactPackage> mPackages = new ArrayList<>();
+  private final List<ReactPackage> mPackages = new ArrayList<>();
 
-  protected @Nullable String mJSBundleAssetUrl;
-  protected @Nullable JSBundleLoader mJSBundleLoader;
-  protected @Nullable String mJSMainModuleName;
-  protected @Nullable NotThreadSafeBridgeIdleDebugListener mBridgeIdleDebugListener;
-  protected @Nullable Application mApplication;
-  protected boolean mUseDeveloperSupport;
-  protected @Nullable LifecycleState mInitialLifecycleState;
-  protected @Nullable UIImplementationProvider mUIImplementationProvider;
-  protected @Nullable NativeModuleCallExceptionHandler mNativeModuleCallExceptionHandler;
-  protected JSCConfig mJSCConfig = JSCConfig.EMPTY;
-  protected @Nullable Activity mCurrentActivity;
-  protected @Nullable DefaultHardwareBackBtnHandler mDefaultHardwareBackBtnHandler;
-  protected @Nullable RedBoxHandler mRedBoxHandler;
-  protected boolean mLazyNativeModulesEnabled;
-  protected boolean mLazyViewManagersEnabled;
-  protected @Nullable DevBundleDownloadListener mDevBundleDownloadListener;
-  protected boolean mUseSeparateUIBackgroundThread;
-  protected int mMinNumShakes = 1;
-  protected boolean mEnableSplitPackage;
-  protected boolean mUseOnlyDefaultPackages;
+  private @Nullable String mJSBundleAssetUrl;
+  private @Nullable JSBundleLoader mJSBundleLoader;
+  private @Nullable String mJSMainModuleName;
+  private @Nullable NotThreadSafeBridgeIdleDebugListener mBridgeIdleDebugListener;
+  private @Nullable Application mApplication;
+  private boolean mUseDeveloperSupport;
+  private @Nullable LifecycleState mInitialLifecycleState;
+  private @Nullable UIImplementationProvider mUIImplementationProvider;
+  private @Nullable NativeModuleCallExceptionHandler mNativeModuleCallExceptionHandler;
+  private JSCConfig mJSCConfig = JSCConfig.EMPTY;
+  private @Nullable Activity mCurrentActivity;
+  private @Nullable DefaultHardwareBackBtnHandler mDefaultHardwareBackBtnHandler;
+  private @Nullable RedBoxHandler mRedBoxHandler;
+  private boolean mLazyNativeModulesEnabled;
+  private boolean mLazyViewManagersEnabled;
+  private @Nullable DevBundleDownloadListener mDevBundleDownloadListener;
+  private boolean mUseSeparateUIBackgroundThread;
+  private int mMinNumShakes = 1;
+  private boolean mEnableSplitPackage;
+  private boolean mUseOnlyDefaultPackages;
 
   /* package protected */ ReactInstanceManagerBuilder() {
   }