diff --git a/android/src/main/java/com/fastopenpgp/FastOpenpgpModule.kt b/android/src/main/java/com/fastopenpgp/FastOpenpgpModule.kt
index 0c8dbd0..fcde808 100644
--- a/android/src/main/java/com/fastopenpgp/FastOpenpgpModule.kt
+++ b/android/src/main/java/com/fastopenpgp/FastOpenpgpModule.kt
@@ -5,20 +5,20 @@ import androidx.annotation.NonNull
 import com.facebook.react.bridge.*
 
 internal class FastOpenpgpModule(reactContext: ReactApplicationContext) :
-    ReactContextBaseJavaModule(reactContext) {
+  ReactContextBaseJavaModule(reactContext) {
 
   val TAG = "[FastOpenPGPModule]"
 
-    external fun initialize(jsiPtr: Long);
-    external fun destruct();
-    external fun callJSI(jsiPtr: Long, name: String, payload: ByteArray): ByteArray;
-    external fun callNative(name: String, payload: ByteArray): ByteArray;
+  external fun initialize(jsiPtr: Long);
+  external fun destruct();
+  external fun callJSI(jsiPtr: Long, name: String, payload: ByteArray): ByteArray;
+  external fun callNative(name: String, payload: ByteArray): ByteArray;
 
-    companion object {
-        init {
-            System.loadLibrary("fast-openpgp")
-        }
+  companion object {
+    init {
+      System.loadLibrary("fast-openpgp")
     }
+  }
 
   @ReactMethod
   fun callJSI(name: String, payload: ReadableArray, promise: Promise) {
@@ -61,26 +61,22 @@ internal class FastOpenpgpModule(reactContext: ReactApplicationContext) :
     }.start()
   }
 
-  @ReactMethod
-  fun install(promise: Promise) {
-    Thread {
-      reactApplicationContext.runOnJSQueueThread {
-        Log.d(TAG, "installing")
-        try {
-          val contextHolder = this.reactApplicationContext.javaScriptContextHolder!!.get()
-          if (contextHolder.toInt() == 0) {
-            promise.resolve(false)
-            return@runOnJSQueueThread
-          }
-          initialize(contextHolder)
-          Log.i(TAG, "successfully installed")
-          promise.resolve(true)
-        } catch (exception: java.lang.Exception) {
-          Log.e(TAG, "failed to install JSI", exception)
-          promise.reject(exception)
-        }
+  @ReactMethod(isBlockingSynchronousMethod = true)
+  fun install(): Boolean {
+    Log.d(TAG, "installing")
+    try {
+      val contextHolder = this.reactApplicationContext.javaScriptContextHolder!!.get()
+      if (contextHolder.toInt() == 0) {
+        Log.d(TAG, "context not available")
+        return false
       }
-    }.start()
+      initialize(contextHolder)
+      Log.i(TAG, "successfully installed")
+      return true
+    } catch (exception: java.lang.Exception) {
+      Log.e(TAG, "failed to install JSI", exception)
+      return false
+    }
   }
 
   override fun getName(): String {
@@ -91,4 +87,3 @@ internal class FastOpenpgpModule(reactContext: ReactApplicationContext) :
     destruct();
   }
 }
-
diff --git a/example/ios/Podfile.lock b/example/ios/Podfile.lock
index c14c60a..cdb8939 100644
--- a/example/ios/Podfile.lock
+++ b/example/ios/Podfile.lock
@@ -375,7 +375,7 @@ PODS:
   - React-jsinspector (0.72.6)
   - React-logger (0.72.6):
     - glog
-  - react-native-fast-openpgp (2.6.0):
+  - react-native-fast-openpgp (2.7.1):
     - RCT-Folly (= 2021.07.22.00)
     - React-Core
   - React-NativeModulesApple (0.72.6):
@@ -698,7 +698,7 @@ SPEC CHECKSUMS:
   React-jsiexecutor: 3bf18ff7cb03cd8dfdce08fbbc0d15058c1d71ae
   React-jsinspector: 194e32c6aab382d88713ad3dd0025c5f5c4ee072
   React-logger: cebf22b6cf43434e471dc561e5911b40ac01d289
-  react-native-fast-openpgp: eb8ca17f55e866965515a9e2b0b4a1dfc26a72d6
+  react-native-fast-openpgp: 50b906a9d41f1a3c0f0190e755b7fc37060a6b55
   React-NativeModulesApple: 02e35e9a51e10c6422f04f5e4076a7c02243fff2
   React-perflogger: e3596db7e753f51766bceadc061936ef1472edc3
   React-RCTActionSheet: 17ab132c748b4471012abbcdcf5befe860660485
@@ -723,4 +723,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: 71caf16b5cb1532cfe3e9f0ca018f42889cbeede
 
-COCOAPODS: 1.13.0
+COCOAPODS: 1.14.3
diff --git a/example/src/App.tsx b/example/src/App.tsx
index 2f944f9..6cf543d 100644
--- a/example/src/App.tsx
+++ b/example/src/App.tsx
@@ -116,12 +116,8 @@ D4m65Neoc7DBEdvzgK9IUMpwG5N0t+0pfWLhs8AZdMxE7RbP
 =kbtq
 -----END PGP PUBLIC KEY BLOCK-----`;
 
+OpenPGP.useJSI = true;
 const App = () => {
-
-  useEffect(()=>{
-    OpenPGP.useJSI = true
-  },[])
-
   return (
     <>
       <StatusBar barStyle="dark-content" />
@@ -172,13 +168,8 @@ const App = () => {
                 privateKey={privateKey}
                 passphrase={passphrase}
               />
-              <Metadata
-                publicKey={publicKey}
-                privateKey={privateKey}
-              />
-              <Convert
-                privateKey={privateKey}
-              />
+              <Metadata publicKey={publicKey} privateKey={privateKey} />
+              <Convert privateKey={privateKey} />
             </View>
           </ScrollView>
         </KeyboardAvoidingView>
@@ -188,14 +179,13 @@ const App = () => {
 };
 
 const styles = StyleSheet.create({
-  container: {
-  },
+  container: {},
   scrollView: {
     backgroundColor: Colors.lighter,
   },
   body: {
     backgroundColor: Colors.white,
-    minHeight: Dimensions.get("screen").height
+    minHeight: Dimensions.get('screen').height,
   },
 });
 
diff --git a/ios/FastOpenpgp.mm b/ios/FastOpenpgp.mm
index 52d0ce0..238ab4a 100644
--- a/ios/FastOpenpgp.mm
+++ b/ios/FastOpenpgp.mm
@@ -98,20 +98,21 @@ @implementation FastOpenpgp
     resolve(result);
 }
 
-RCT_REMAP_METHOD(install,installWithResolver:(RCTPromiseResolveBlock)resolve
-                 withReject:(RCTPromiseRejectBlock)reject)
+RCT_EXPORT_BLOCKING_SYNCHRONOUS_METHOD(install)
 {
     RCTCxxBridge *cxxBridge = (RCTCxxBridge *)self.bridge;
     if (!cxxBridge.runtime) {
-        NSNumber * val = [NSNumber numberWithBool:NO];
-        resolve(val);
-        return;
+        return @false;
     }
-    jsi::Runtime * runtime = (jsi::Runtime *)cxxBridge.runtime;
+    using namespace facebook;
+    auto jsiRuntime = (jsi::Runtime *)cxxBridge.runtime;
+    if (jsiRuntime == nil) {
+        return @false;
+    }
+    auto &runtime = *jsiRuntime;
 
-    fastOpenPGP::install(*runtime);
-    NSNumber * val = [NSNumber numberWithBool:TRUE];
-    resolve(val);
+    fastOpenPGP::install(runtime);
+    return @true;
 }
 
 + (BOOL)requiresMainQueueSetup {
diff --git a/package.json b/package.json
index 2f5dde2..c2f7dca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-fast-openpgp",
-  "version": "2.7.1",
+  "version": "2.7.2",
   "description": "library for use openPGP",
   "main": "lib/commonjs/index",
   "module": "lib/module/index",
diff --git a/src/index.tsx b/src/index.tsx
index 6c1d6ad..43d47b5 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -636,7 +636,7 @@ export default class OpenPGP {
       let result: BridgeResponse;
       if (this.useJSI) {
         if (!this.loaded) {
-          this.loaded = await FastOpenPGPNativeModules.install();
+          this.loaded = FastOpenPGPNativeModules.install();
           console.log(
             this.TAG,
             `(${name})`,
diff --git a/src/types.d.ts b/src/types.d.ts
index e91c592..a0ac5f2 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -46,7 +46,7 @@ interface FastOpenPGPNativeModules {
   /**
    * this method will install JSI definitions
    */
-  install(): Promise<boolean>;
+  install(): boolean;
 }
 
 interface NativeModulesDef {