diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 8b3b13b..2bba959 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -12,9 +12,12 @@ jobs:
     runs-on: macos-10.15
     strategy:
       matrix:
-        rn-version: [0.69, 0.68]
+        rn-version: ['0.70', '0.69']
         v8-android-variant:
           [v8-android-jit, v8-android-jit-nointl, v8-android, v8-android-nointl]
+        include:
+          - rn-version: '0.68'
+            v8-android-variant: v8-android-jit
 
     steps:
       - uses: actions/checkout@v2
diff --git a/android/src/main/cpp/V8ExecutorFactory.cpp b/android/src/main/cpp/V8ExecutorFactory.cpp
index c55e2e5..138f2ac 100644
--- a/android/src/main/cpp/V8ExecutorFactory.cpp
+++ b/android/src/main/cpp/V8ExecutorFactory.cpp
@@ -22,7 +22,7 @@ namespace rnv8 {
 namespace {
 
 std::unique_ptr<jsi::Runtime> makeV8RuntimeSystraced(
-    std::unique_ptr<V8RuntimeConfig> config, 
+    std::unique_ptr<V8RuntimeConfig> config,
     std::shared_ptr<react::MessageQueueThread> jsQueue) {
   react::SystraceSection s("V8ExecutorFactory::makeV8RuntimeSystraced");
   return createV8Runtime(std::move(config), jsQueue);
diff --git a/scripts/lib/patcher.py b/scripts/lib/patcher.py
index 8e8e090..7ea46ed 100644
--- a/scripts/lib/patcher.py
+++ b/scripts/lib/patcher.py
@@ -72,6 +72,7 @@ def _patch_app_gradle(self):
         with io.open(app_gradle_path, "r", encoding="utf8") as f:
             content = str(f.read())
         new_content = self._get_patched_packging_option(content)
+        new_content = new_content.replace("enableHermes: true", "enableHermes: false")
         with io.open(app_gradle_path, "w", encoding="utf8") as f:
             f.write(new_content)
 
diff --git a/src/v8runtime/V8Inspector.cpp b/src/v8runtime/V8Inspector.cpp
index 3ea3144..891eb6b 100644
--- a/src/v8runtime/V8Inspector.cpp
+++ b/src/v8runtime/V8Inspector.cpp
@@ -138,7 +138,7 @@ InspectorClient::InspectorClient(
     v8::Local<v8::Context> context,
     const std::string &appName,
     const std::string &deviceName) {
-  jsQueue_ = jsQueue;    
+  jsQueue_ = jsQueue;
   isolate_ = context->GetIsolate();
   v8::HandleScope scopedHandle(isolate_);
   channel_.reset(new InspectorFrontend(this, context));
@@ -246,15 +246,16 @@ void InspectorClient::DispatchProxy(const std::string &message) {
   auto messageObj = folly::parseJson(message);
   auto method = messageObj["method"].asString();
 
-  // For `v8::CpuProfiler` or some other modules with thread local storage, we should dispatch messages in the js thread.
+  // For `v8::CpuProfiler` or some other modules with thread local storage, we
+  // should dispatch messages in the js thread.
   if (method == "Profiler.start" || method == "Profiler.stop") {
     jsQueue_->runOnQueue([this, normalizedString]() {
-        v8::Isolate *isolate = GetIsolate();
-        v8::Locker locker(isolate);
-        v8::Isolate::Scope scopedIsolate(isolate);
-        v8::HandleScope scopedHandle(isolate);
-        v8::Context::Scope scopedContext(GetContext().Get(isolate));
-        session_->dispatchProtocolMessage(ToStringView(normalizedString));
+      v8::Isolate *isolate = GetIsolate();
+      v8::Locker locker(isolate);
+      v8::Isolate::Scope scopedIsolate(isolate);
+      v8::HandleScope scopedHandle(isolate);
+      v8::Context::Scope scopedContext(GetContext().Get(isolate));
+      session_->dispatchProtocolMessage(ToStringView(normalizedString));
     });
     return;
   }
diff --git a/src/v8runtime/V8Inspector.h b/src/v8runtime/V8Inspector.h
index a9fc2be..7eeb2f1 100644
--- a/src/v8runtime/V8Inspector.h
+++ b/src/v8runtime/V8Inspector.h
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include <condition_variable>
 #include <cxxreact/MessageQueueThread.h>
+#include <condition_variable>
 #include "jsinspector/InspectorInterfaces.h"
 #include "v8-inspector.h"
 
diff --git a/src/v8runtime/V8Runtime.cpp b/src/v8runtime/V8Runtime.cpp
index 2c23c9a..b26a9e1 100644
--- a/src/v8runtime/V8Runtime.cpp
+++ b/src/v8runtime/V8Runtime.cpp
@@ -30,8 +30,9 @@ const char kHostFunctionProxyProp[] = "__hostFunctionProxy";
 std::unique_ptr<v8::Platform> V8Runtime::s_platform = nullptr;
 std::mutex s_platform_mutex; // protects s_platform
 
-V8Runtime::V8Runtime(std::unique_ptr<V8RuntimeConfig> config, 
-std::shared_ptr<facebook::react::MessageQueueThread> jsQueue)
+V8Runtime::V8Runtime(
+    std::unique_ptr<V8RuntimeConfig> config,
+    std::shared_ptr<facebook::react::MessageQueueThread> jsQueue)
     : config_(std::move(config)) {
   {
     const std::lock_guard<std::mutex> lock(s_platform_mutex);
@@ -70,7 +71,10 @@ std::shared_ptr<facebook::react::MessageQueueThread> jsQueue)
   jsQueue_ = jsQueue;
   if (config_->enableInspector) {
     inspectorClient_ = std::make_shared<InspectorClient>(
-        jsQueue_, context_.Get(isolate_), config_->appName, config_->deviceName);
+        jsQueue_,
+        context_.Get(isolate_),
+        config_->appName,
+        config_->deviceName);
     inspectorClient_->ConnectToReactFrontend();
   }
 }
@@ -108,7 +112,10 @@ V8Runtime::V8Runtime(
 
   if (config_->enableInspector) {
     inspectorClient_ = std::make_shared<InspectorClient>(
-        jsQueue_, context_.Get(isolate_), config_->appName, config_->deviceName);
+        jsQueue_,
+        context_.Get(isolate_),
+        config_->appName,
+        config_->deviceName);
     inspectorClient_->ConnectToReactFrontend();
   }
 }
@@ -486,6 +493,25 @@ jsi::Runtime::PointerValue *V8Runtime::cloneSymbol(
   return new V8PointerValue(isolate_, v8PointerValue->Get(isolate_));
 }
 
+#if REACT_NATIVE_TARGET_VERSION >= 70
+jsi::Runtime::PointerValue *V8Runtime::cloneBigInt(
+    const Runtime::PointerValue *pv) {
+  if (!pv) {
+    return nullptr;
+  }
+
+  v8::Locker locker(isolate_);
+  v8::Isolate::Scope scopedIsolate(isolate_);
+  v8::HandleScope scopedHandle(isolate_);
+  v8::Context::Scope scopedContext(context_.Get(isolate_));
+
+  const V8PointerValue *v8PointerValue =
+      static_cast<const V8PointerValue *>(pv);
+  assert(v8PointerValue->Get(isolate_)->IsBigInt());
+  return new V8PointerValue(isolate_, v8PointerValue->Get(isolate_));
+}
+#endif
+
 jsi::Runtime::PointerValue *V8Runtime::cloneString(
     const Runtime::PointerValue *pv) {
   if (!pv) {
@@ -1244,6 +1270,27 @@ bool V8Runtime::strictEquals(const jsi::Symbol &a, const jsi::Symbol &b) const {
   return result;
 }
 
+#if REACT_NATIVE_TARGET_VERSION >= 70
+bool V8Runtime::strictEquals(const jsi::BigInt &a, const jsi::BigInt &b) const {
+  v8::Locker locker(isolate_);
+  v8::Isolate::Scope scopedIsolate(isolate_);
+  v8::HandleScope scopedHandle(isolate_);
+  v8::Context::Scope scopedContext(context_.Get(isolate_));
+
+  v8::TryCatch tryCatch(isolate_);
+  v8::Local<v8::Value> v8ValueA =
+      (static_cast<const V8PointerValue *>(getPointerValue(a)))->Get(isolate_);
+  v8::Local<v8::Value> v8ValueB =
+      (static_cast<const V8PointerValue *>(getPointerValue(b)))->Get(isolate_);
+  bool result = v8ValueA->StrictEquals(v8ValueB);
+
+  if (tryCatch.HasCaught()) {
+    ReportException(isolate_, &tryCatch);
+  }
+  return result;
+}
+#endif
+
 bool V8Runtime::strictEquals(const jsi::String &a, const jsi::String &b) const {
   v8::Locker locker(isolate_);
   v8::Isolate::Scope scopedIsolate(isolate_);
diff --git a/src/v8runtime/V8Runtime.h b/src/v8runtime/V8Runtime.h
index 5e9d0ce..18b65b3 100644
--- a/src/v8runtime/V8Runtime.h
+++ b/src/v8runtime/V8Runtime.h
@@ -21,8 +21,9 @@ class InspectorClient;
 
 class V8Runtime : public facebook::jsi::Runtime {
  public:
-  V8Runtime(std::unique_ptr<V8RuntimeConfig> config, 
-  std::shared_ptr<facebook::react::MessageQueueThread> jsQueue);
+  V8Runtime(
+      std::unique_ptr<V8RuntimeConfig> config,
+      std::shared_ptr<facebook::react::MessageQueueThread> jsQueue);
   V8Runtime(
       const V8Runtime *v8Runtime,
       std::unique_ptr<V8RuntimeConfig> config);
@@ -73,6 +74,9 @@ class V8Runtime : public facebook::jsi::Runtime {
 
  protected:
   PointerValue *cloneSymbol(const Runtime::PointerValue *pv) override;
+#if REACT_NATIVE_TARGET_VERSION >= 70
+  PointerValue *cloneBigInt(const Runtime::PointerValue *pv) override;
+#endif
   PointerValue *cloneString(const Runtime::PointerValue *pv) override;
   PointerValue *cloneObject(const Runtime::PointerValue *pv) override;
   PointerValue *clonePropNameID(const Runtime::PointerValue *pv) override;
@@ -170,6 +174,11 @@ class V8Runtime : public facebook::jsi::Runtime {
   bool strictEquals(
       const facebook::jsi::Symbol &a,
       const facebook::jsi::Symbol &b) const override;
+#if REACT_NATIVE_TARGET_VERSION >= 70
+  bool strictEquals(
+      const facebook::jsi::BigInt &a,
+      const facebook::jsi::BigInt &b) const override;
+#endif
   bool strictEquals(
       const facebook::jsi::String &a,
       const facebook::jsi::String &b) const override;
diff --git a/src/v8runtime/V8RuntimeFactory.h b/src/v8runtime/V8RuntimeFactory.h
index 5a0850d..972b27b 100644
--- a/src/v8runtime/V8RuntimeFactory.h
+++ b/src/v8runtime/V8RuntimeFactory.h
@@ -7,15 +7,16 @@
 
 #pragma once
 
+#include <cxxreact/MessageQueueThread.h>
 #include <memory.h>
 #include "V8RuntimeConfig.h"
 #include "jsi/jsi.h"
-#include <cxxreact/MessageQueueThread.h>
 
 namespace rnv8 {
 
 std::unique_ptr<facebook::jsi::Runtime> createV8Runtime(
-    std::unique_ptr<V8RuntimeConfig> config, std::shared_ptr<facebook::react::MessageQueueThread> jsQueue);
+    std::unique_ptr<V8RuntimeConfig> config,
+    std::shared_ptr<facebook::react::MessageQueueThread> jsQueue);
 
 std::unique_ptr<facebook::jsi::Runtime> createSharedV8Runtime(
     const facebook::jsi::Runtime *sharedRuntime,