diff --git a/RNIronSourceOfferwall.js b/RNIronSourceOfferwall.js
index 2fc1d687..474133fc 100644
--- a/RNIronSourceOfferwall.js
+++ b/RNIronSourceOfferwall.js
@@ -52,6 +52,7 @@ module.exports = {
   ...RNIronSourceOfferwall,
   initializeOfferwall: () => {}, // Deprecated. Here for backwards compatibility with 2.8.0
   showOfferwall: () => RNIronSourceOfferwall.showOfferwall(),
+  setOWCustomParams: (field, paramValue) => RNIronSourceOfferwall.setOWCustomParams(field, paramValue),
   addEventListener,
   removeEventListener,
   removeAllListeners
diff --git a/android/src/main/java/co/squaretwo/ironsource/RNIronSourceOfferwallModule.java b/android/src/main/java/co/squaretwo/ironsource/RNIronSourceOfferwallModule.java
index f7c6c3de..00b0249d 100644
--- a/android/src/main/java/co/squaretwo/ironsource/RNIronSourceOfferwallModule.java
+++ b/android/src/main/java/co/squaretwo/ironsource/RNIronSourceOfferwallModule.java
@@ -3,6 +3,8 @@
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
+import java.util.HashMap;
+import java.util.Map;
 import androidx.annotation.Nullable;
 import com.facebook.react.bridge.Callback;
 import com.facebook.react.bridge.WritableMap;
@@ -103,6 +105,8 @@ public void onGetOfferwallCreditsFailed(IronSourceError error) {
                          */
                         @Override
                         public void onOfferwallClosed() {
+                            Log.d(TAG, "onOfferwallClosed() called!");
+                            sendEvent("ironSourceOfferwallClosedByUser", null);
                         }
                     });
                 }
@@ -130,6 +134,13 @@ public void run() {
         });
     }
 
+    @ReactMethod
+    public void setOWCustomParams(String field, String paramValue) {
+        Map<String, String> owParams = new HashMap<String, String>();
+        owParams.put(field, paramValue);
+        SupersonicConfig.getConfigObj().setOfferwallCustomParams(owParams);
+    }
+
     private void sendEvent(String eventName, @Nullable WritableMap params) {
         getReactApplicationContext().getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class).emit(eventName, params);
     }
diff --git a/ios/RNIronSourceOfferWall.m b/ios/RNIronSourceOfferWall.m
index aa93641a..006e1d86 100644
--- a/ios/RNIronSourceOfferWall.m
+++ b/ios/RNIronSourceOfferWall.m
@@ -51,7 +51,7 @@ -(void)safeInitializeOfferwall
     if ([IronSource hasOfferwall]) {
         NSLog(@"showOfferwall - offerwall available");
         [self sendEventWithName:kIronSourceOfferwallAvailable body:nil];
-        
+
         dispatch_async(dispatch_get_main_queue(), ^{
             [IronSource showOfferwallWithViewController:RCTPresentedViewController()];
         });
@@ -61,6 +61,13 @@ -(void)safeInitializeOfferwall
     }
 }
 
+RCT_EXPORT_METHOD(setOWCustomParams:(NSString *)field paramValue:(NSString *)paramValue)
+{
+    NSMutableDictionary * owDic = [[NSMutableDictionary alloc] init];
+    owDic[field] = paramValue;
+    [ISConfigurations configurations].offerwallCustomParameters = owDic;
+}
+
 
 #pragma mark delegate events