diff --git a/MJExtension.podspec b/MJExtension.podspec
index 6ee7b10a..e382bc88 100644
--- a/MJExtension.podspec
+++ b/MJExtension.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "MJExtension"
-  s.version      = "3.0.16"
+  s.version      = "3.0.17"
   s.ios.deployment_target = '8.0'
   s.osx.deployment_target = '10.8'
   s.summary      = "A fast and convenient conversion between JSON and model"
diff --git a/MJExtension/MJFoundation.m b/MJExtension/MJFoundation.m
index f8388a91..b145076b 100644
--- a/MJExtension/MJFoundation.m
+++ b/MJExtension/MJFoundation.m
@@ -61,6 +61,7 @@ + (BOOL)isFromNSObjectProtocolProperty:(NSString *)propertyName
             }
         }
         objectProtocolPropertyNames = [propertyNames copy];
+        free(propertyList);
     });
     
     return [objectProtocolPropertyNames containsObject:propertyName];