diff --git a/ChangeLog.md b/ChangeLog.md
index deaa200a..1e8e2e38 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,7 @@
 # CppJieba ChangeLog
 
++ Upgrade [limonp](https://github.com/yanyiwu/limonp) -> v0.6.3
+
 ## v5.0.2
 
 + Upgrade [limonp](https://github.com/yanyiwu/limonp) -> v0.6.1
diff --git a/deps/limonp/StdExtension.hpp b/deps/limonp/StdExtension.hpp
index e6621723..cf00e941 100644
--- a/deps/limonp/StdExtension.hpp
+++ b/deps/limonp/StdExtension.hpp
@@ -29,8 +29,6 @@ using std::tr1::unordered_set;
 #include <fstream>
 #include <sstream>
 
-#define print(x) std::cout << x << std::endl
-
 namespace std {
 
 template<typename T>