diff --git a/AVOS/Sources/Foundation/UserAgent.h b/AVOS/Sources/Foundation/UserAgent.h
index 70b8eb27..e1c91dd8 100644
--- a/AVOS/Sources/Foundation/UserAgent.h
+++ b/AVOS/Sources/Foundation/UserAgent.h
@@ -1 +1 @@
-#define SDK_VERSION @"13.7.0"
+#define SDK_VERSION @"13.7.1"
diff --git a/AVOS/Sources/Realtime/IM/Message/LCIMMessage.m b/AVOS/Sources/Realtime/IM/Message/LCIMMessage.m
index 371c0a51..db807938 100644
--- a/AVOS/Sources/Realtime/IM/Message/LCIMMessage.m
+++ b/AVOS/Sources/Realtime/IM/Message/LCIMMessage.m
@@ -28,6 +28,10 @@ @implementation LCIMMessagePatchedReason
 @implementation LCIMMessage
 
 + (instancetype)messageWithContent:(NSString *)content {
+    if (content && ![NSString _lc_isTypeOf:content]) {
+        [NSException raise:NSInvalidArgumentException
+                    format:@"The type of content is not `NSString`."];
+    }
     LCIMMessage *message = [[self alloc] init];
     message.content = content;
     return message;
diff --git a/AVOS/Sources/Realtime/IM/TypedMessages/LCIMTypedMessage.m b/AVOS/Sources/Realtime/IM/TypedMessages/LCIMTypedMessage.m
index 4e7a45ef..c3d3c600 100644
--- a/AVOS/Sources/Realtime/IM/TypedMessages/LCIMTypedMessage.m
+++ b/AVOS/Sources/Realtime/IM/TypedMessages/LCIMTypedMessage.m
@@ -174,6 +174,10 @@ - (NSString *)text
 
 - (void)setText:(NSString *)text
 {
+    if (text && ![NSString _lc_isTypeOf:text]) {
+        [NSException raise:NSInvalidArgumentException
+                    format:@"The type of text is not `NSString`."];
+    }
     self.messageObject._lctext = text;
 }
 
diff --git a/LeanCloudObjc.podspec b/LeanCloudObjc.podspec
index 1ab604e5..fdc76e84 100644
--- a/LeanCloudObjc.podspec
+++ b/LeanCloudObjc.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'LeanCloudObjc'
-  s.version  = '13.7.0'
+  s.version  = '13.7.1'
   s.homepage = 'https://leancloud.cn/'
   s.summary  = 'LeanCloud Objective-C SDK'
   s.authors  = 'LeanCloud'