diff --git a/android/build.gradle b/android/build.gradle
index 82f60d3d..332a10e6 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -9,7 +9,7 @@ buildscript {
     if (project == rootProject) {
         repositories {
             google()
-            jcenter()
+            // jcenter()
             maven {
                 url "https://maven.fabric.io/public"
             }
@@ -17,7 +17,7 @@ buildscript {
         }
 
         dependencies {
-            classpath("com.android.tools.build:gradle:3.5.3")
+            classpath("com.android.tools.build:gradle:4.0.1")
         }
     }
 }
@@ -45,7 +45,7 @@ allprojects {
     repositories {
         mavenLocal()
         google()
-        jcenter()
+        // jcenter()
         maven {
             // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
             url "$rootDir/../node_modules/react-native/android"
@@ -55,8 +55,8 @@ allprojects {
 
 dependencies {
     implementation 'com.facebook.react:react-native:+'
-    implementation 'com.madgag.spongycastle:core:1.56.0.0'
-    implementation 'com.madgag.spongycastle:prov:1.56.0.0'
-    implementation 'com.madgag.spongycastle:bcpkix-jdk15on:1.56.0.0'
+    // implementation 'com.madgag.spongycastle:core:1.56.0.0'
+    // implementation 'com.madgag.spongycastle:prov:1.56.0.0'
+    // implementation 'com.madgag.spongycastle:bcpkix-jdk15on:1.56.0.0'
 }
   
diff --git a/ios/RNRSA.swift b/ios/RNRSA.swift
index cff291b9..01a81021 100644
--- a/ios/RNRSA.swift
+++ b/ios/RNRSA.swift
@@ -11,6 +11,11 @@ import Foundation
 @objc(RNRSA)
 class RNRSA: NSObject {
     
+    @objc 
+    static 
+    func requiresMainQueueSetup() -> Bool {
+      return false
+    }
     
     @objc
     func constantsToExport() -> [AnyHashable : Any]! {
diff --git a/ios/RNRSAKeychain.swift b/ios/RNRSAKeychain.swift
index 31b8e880..0479c12b 100644
--- a/ios/RNRSAKeychain.swift
+++ b/ios/RNRSAKeychain.swift
@@ -11,6 +11,11 @@ import Foundation
 @objc(RNRSAKeychain)
 class RNRSAKeychain: NSObject {
     
+    @objc 
+    static 
+    func requiresMainQueueSetup() -> Bool {
+      return false
+    }
     
     @objc
     func constantsToExport() -> [AnyHashable : Any]! {