diff --git a/android/src/main/java/com/rncloudinary/RNCloudinaryModule.java b/android/src/main/java/com/rncloudinary/RNCloudinaryModule.java
index bb5d9e2..c3d95aa 100644
--- a/android/src/main/java/com/rncloudinary/RNCloudinaryModule.java
+++ b/android/src/main/java/com/rncloudinary/RNCloudinaryModule.java
@@ -5,6 +5,8 @@
 import android.util.Log;
 
 import com.cloudinary.ProgressCallback;
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.bridge.Promise;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
@@ -19,6 +21,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.Map;
 
 public class RNCloudinaryModule extends ReactContextBaseJavaModule {
@@ -35,6 +38,32 @@ public RNCloudinaryModule(ReactApplicationContext reactContext) {
     this.reactContext = reactContext;
   }
 
+  public static WritableMap toWritableMap(Map<String, Object> map) {
+    WritableMap writableMap = Arguments.createMap();
+    Iterator iterator = map.entrySet().iterator();
+
+    while (iterator.hasNext()) {
+      Map.Entry pair = (Map.Entry) iterator.next();
+      Object value = pair.getValue();
+
+      if (value == null) {
+        writableMap.putNull((String) pair.getKey());
+      } else if (value instanceof Boolean) {
+        writableMap.putBoolean((String) pair.getKey(), (Boolean) value);
+      } else if (value instanceof Double) {
+        writableMap.putDouble((String) pair.getKey(), (Double) value);
+      } else if (value instanceof Integer) {
+        writableMap.putInt((String) pair.getKey(), (Integer) value);
+      } else if (value instanceof String) {
+        writableMap.putString((String) pair.getKey(), (String) value);
+      }
+
+      iterator.remove();
+    }
+
+    return writableMap;
+  }
+
   @Override
   public String getName() {
     return "RNCloudinary";
@@ -62,18 +91,10 @@ public void uploadImage(String path, Promise promise) {
 
       Uri myFileUri = Uri.parse(path);
       InputStream inputStream = this.reactContext.getContentResolver().openInputStream(myFileUri);
-      this.mCloudinary.uploader().unsignedUpload(inputStream, this.mPresetName, this.mConfig, new ProgressCallback() {
-        public void onProgress(long bytesUploaded, long totalBytes) {
-          if (bytesUploaded >= totalBytes) {
-            if (_this.isResolved == false) {
-              _promise.resolve("success");
-              _this.isResolved = true;
-            }
-          } else {
-
-          }
-        }
-      }) ;
+      Map uploadResult = this.mCloudinary.uploader().unsignedUpload(inputStream, this.mPresetName, this.mConfig);
+      WritableMap res = RNCloudinaryModule.toWritableMap(uploadResult);
+      _promise.resolve(res);
+      _this.isResolved = true;
     } catch (RuntimeException e) {
       String code = "Error";
       String message = "Error";
@@ -89,4 +110,4 @@ public void onProgress(long bytesUploaded, long totalBytes) {
 
   }
 
-}
\ No newline at end of file
+}
diff --git a/ios/RNCloudinary.m b/ios/RNCloudinary.m
index 46a8b13..c31bd04 100644
--- a/ios/RNCloudinary.m
+++ b/ios/RNCloudinary.m
@@ -59,17 +59,19 @@ - (dispatch_queue_t)methodQueue {
     reject(code, message, error);
   }
   
-  if (self.cloudinary) {
-    [[self.cloudinary createUploader] uploadWithData:data uploadPreset:self.presetName params:NULL progress:^(NSProgress * progress) {
-      
-    } completionHandler:^(CLDUploadResult * result, NSError * error) {
-      NSArray *keys = [NSArray arrayWithObjects:@"result", @"error", nil];
-      NSArray *objects = [NSArray arrayWithObjects:@"success", @"", nil];
-      NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects
-                                                             forKeys:keys];
-      resolve(dictionary);
-    }];
-  } else {
+    if (self.cloudinary) {
+        [[self.cloudinary createUploader] uploadWithData:data uploadPreset:self.presetName params:NULL progress:^(NSProgress * progress) {
+            
+        } completionHandler:^(CLDUploadResult * result, NSError * error) {
+            if (error) {
+                NSString *code = @"Cloudinary error";
+                NSString *message = @"Cloudinary service returned an error.";
+                reject(code, message , error);
+            } else {
+                resolve([result resultJson]);
+            }
+        }];
+    } else {
     NSString *code = @"not configured";
     NSString *message = @"Cloudinary service is not configured correctly.";
     NSError *error = [NSError errorWithDomain:@"RNCloudinary" code:0 userInfo:nil];