diff --git a/src/ios/Updater/HCPFetchUpdateOptions.h b/src/ios/Updater/HCPFetchUpdateOptions.h
index db161503..5daac422 100644
--- a/src/ios/Updater/HCPFetchUpdateOptions.h
+++ b/src/ios/Updater/HCPFetchUpdateOptions.h
@@ -14,12 +14,22 @@
 /**
  *  URL to the config file (chcp.json).
  */
-@property (nonatomic, strong) NSURL *configFileURL;
+@property (nonatomic, strong, readonly) NSURL *configFileURL;
 
 /**
  *  Additional request headers.
  */
-@property (nonatomic, strong) NSDictionary<NSString *, NSString *> *requestHeaders;
+@property (nonatomic, strong, readonly) NSDictionary<NSString *, NSString *> *requestHeaders;
+
+/**
+ *  Constructor.
+ *
+ *  @param configFileURL  config file url
+ *  @param requestHeaders request headers
+ *
+ *  @return object instance
+ */
+- (instancetype)initWithConfigURL:(NSURL *)configFileURL requestHeaders:(NSDictionary<NSString *, NSString *> *)requestHeaders;
 
 /**
  *  Constructor.
diff --git a/src/ios/Updater/HCPFetchUpdateOptions.m b/src/ios/Updater/HCPFetchUpdateOptions.m
index 210d99d6..4e12c838 100644
--- a/src/ios/Updater/HCPFetchUpdateOptions.m
+++ b/src/ios/Updater/HCPFetchUpdateOptions.m
@@ -11,11 +11,21 @@
 
 @implementation HCPFetchUpdateOptions
 
+- (instancetype)initWithConfigURL:(NSURL *)configFileURL requestHeaders:(NSDictionary<NSString *, NSString *> *)requestHeaders {
+    self = [super init];
+    if (self) {
+        _configFileURL = configFileURL;
+        _requestHeaders = requestHeaders;
+    }
+    
+    return self;
+}
+
 - (instancetype)initWithDictionary:(NSDictionary *)dictionary {
     self = [super init];
     if (self) {
-        self.configFileURL = dictionary[CONFIG_URL_JSON_KEY] ? [NSURL URLWithString:dictionary[CONFIG_URL_JSON_KEY]] : nil;
-        self.requestHeaders = dictionary[REQUEST_HEADERS_JSON_KEY];
+        _configFileURL = dictionary[CONFIG_URL_JSON_KEY] ? [NSURL URLWithString:dictionary[CONFIG_URL_JSON_KEY]] : nil;
+        _requestHeaders = dictionary[REQUEST_HEADERS_JSON_KEY];
     }
     
     return self;