diff --git a/SensorsAnalyticsSDK.podspec b/SensorsAnalyticsSDK.podspec
index 8533b40d..4b112b21 100644
--- a/SensorsAnalyticsSDK.podspec
+++ b/SensorsAnalyticsSDK.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "SensorsAnalyticsSDK"
-  s.version      = "4.8.1"
+  s.version      = "4.8.2"
   s.summary      = "The official iOS SDK of Sensors Analytics."
   s.homepage     = "http://www.sensorsdata.cn"
   s.source       = { :git => 'https://github.com/sensorsdata/sa-sdk-ios.git', :tag => "v#{s.version}" }
@@ -12,6 +12,9 @@ Pod::Spec.new do |s|
   s.default_subspec = 'Core'
   s.frameworks = 'Foundation', 'SystemConfiguration'
 
+  # 限制 CocoaPods 版本
+  s.cocoapods_version = '>= 1.12.0'
+
   s.libraries = 'icucore', 'z'
 
   s.subspec '__Store' do |store|
diff --git a/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m b/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
index d3efcf71..447363f4 100755
--- a/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
+++ b/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
@@ -69,7 +69,7 @@
 #import <UIKit/UIApplication.h>
 #endif
 
-#define VERSION @"4.8.1"
+#define VERSION @"4.8.2"
 
 void *SensorsAnalyticsQueueTag = &SensorsAnalyticsQueueTag;
 
diff --git a/SensorsAnalyticsSDK/Core/Tracker/SAEventStore.h b/SensorsAnalyticsSDK/Core/Tracker/SAEventStore.h
index b81f6460..db44ae43 100644
--- a/SensorsAnalyticsSDK/Core/Tracker/SAEventStore.h
+++ b/SensorsAnalyticsSDK/Core/Tracker/SAEventStore.h
@@ -43,6 +43,8 @@ extern NSString * const kSADatabaseDefaultFileName;
  *
  *  @return 初始化的结果
  */
+- (instancetype)initWithFilePath:(NSString *)filePath;
+
 + (instancetype)eventStoreWithFilePath:(NSString *)filePath;
 
 /// fetch first records with a certain size
diff --git a/SensorsAnalyticsSDK/RemoteConfig/SARemoteConfigOperator.h b/SensorsAnalyticsSDK/RemoteConfig/SARemoteConfigOperator.h
index e1822fa1..0c9d6525 100644
--- a/SensorsAnalyticsSDK/RemoteConfig/SARemoteConfigOperator.h
+++ b/SensorsAnalyticsSDK/RemoteConfig/SARemoteConfigOperator.h
@@ -81,7 +81,7 @@ NS_ASSUME_NONNULL_BEGIN
 /// 从请求远程配置的返回结果中获取加密相关内容
 /// @param config 请求远程配置的返回结果
 /// @return 加密相关内容
-- (NSDictionary<NSString *, id> *)extractEncryptConfig:(NSDictionary<NSString *, id> *)config;
+//- (NSDictionary<NSString *, id> *)extractEncryptConfig:(NSDictionary<NSString *, id> *)config;
 
 /// 触发 $AppRemoteConfigChanged 事件
 /// @param remoteConfig 事件中的属性
diff --git a/SensorsAnalyticsSDK/Store/SABaseStoreManager.m b/SensorsAnalyticsSDK/Store/SABaseStoreManager.m
index 7df40996..b7f065fe 100644
--- a/SensorsAnalyticsSDK/Store/SABaseStoreManager.m
+++ b/SensorsAnalyticsSDK/Store/SABaseStoreManager.m
@@ -106,7 +106,7 @@ - (void)registerStorePlugin:(id<SAStorePlugin>)plugin {
         [self.plugins enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id<SAStorePlugin>  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
             if ([plugin.type isEqualToString:obj.type]) {
                 [self.plugins removeObjectAtIndex:idx];
-            } else {
+            } else if ([plugin respondsToSelector:@selector(upgradeWithOldPlugin:)]){
                 [plugin upgradeWithOldPlugin:obj];
             }
         }];
diff --git a/SensorsAnalyticsSDK/Store/SAStorePlugin.h b/SensorsAnalyticsSDK/Store/SAStorePlugin.h
index c71aa3ac..c9bec56c 100644
--- a/SensorsAnalyticsSDK/Store/SAStorePlugin.h
+++ b/SensorsAnalyticsSDK/Store/SAStorePlugin.h
@@ -26,6 +26,11 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (NSString *)type;
 
+- (nullable id)objectForKey:(NSString *)key;
+- (void)setObject:(nullable id)value forKey:(NSString *)key;
+- (void)removeObjectForKey:(NSString *)key;
+
+@optional
 /// 可以用于将一些重要特殊的 key 进行迁移操作
 ///
 /// SDK 会在注册新插件时，调用该方法
@@ -34,10 +39,6 @@ NS_ASSUME_NONNULL_BEGIN
 /// @param oldPlugin 旧插件
 - (void)upgradeWithOldPlugin:(id<SAStorePlugin>)oldPlugin;
 
-- (nullable id)objectForKey:(NSString *)key;
-- (void)setObject:(nullable id)value forKey:(NSString *)key;
-- (void)removeObjectForKey:(NSString *)key;
-
 /// 注册自定义存储插件，是否忽略历史旧数据
 ///
 /// 如果未实现，则默认不忽略，即迁移历史数据迁移