diff --git a/ios/RCTJMessageModule/RCTJMessageModule.m b/ios/RCTJMessageModule/RCTJMessageModule.m
index cb6165c..c6de36f 100644
--- a/ios/RCTJMessageModule/RCTJMessageModule.m
+++ b/ios/RCTJMessageModule/RCTJMessageModule.m
@@ -208,7 +208,8 @@ - (JMSGMessage *)createMessageWithDictionary:(NSDictionary *)param type:(JMSGCon
         return nil;
       }
       content = [[JMSGImageContent alloc] initWithImageData: [NSData dataWithContentsOfFile: mediaPath]];
-      
+      JMSGImageContent *imgContent = content;
+      imgContent.format = [mediaPath pathExtension];
       break;
     }
     case kJMSGContentTypeVoice:{
@@ -251,6 +252,8 @@ - (JMSGMessage *)createMessageWithDictionary:(NSDictionary *)param type:(JMSGCon
       }
       
       content = [[JMSGFileContent alloc] initWithFileData:[NSData dataWithContentsOfFile: mediaPath] fileName: fileName];
+      JMSGFileContent *fileContent = content;
+      fileContent.format =[mediaPath pathExtension];
       break;
     }
     case kJMSGContentTypeCustom:{