diff --git a/doc/6.1.10_0ctf2017_babyheap2017.md b/doc/6.1.10_0ctf2017_babyheap2017.md
index d78b02e..1200361 100644
--- a/doc/6.1.10_0ctf2017_babyheap2017.md
+++ b/doc/6.1.10_0ctf2017_babyheap2017.md
@@ -8,7 +8,7 @@
 [下载文件](../src/writeup/6.1.10_0ctf2017_babyheap2017)
 
 ## 题目复现
-这个题目给出了二进制文件。在 Ubuntu 16.04 上，libc 就用自带。
+这个题目给出了二进制文件。在 Ubuntu 16.04 上，libc 就用自带的。
 ```
 $ file babyheap 
 babyheap: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=9e5bfa980355d6158a76acacb7bda01f4e3fc1c2, stripped
@@ -655,3 +655,4 @@ io.interactive()
 
 ## 参考资料
 - [0ctf Quals 2017 - BabyHeap2017](http://uaf.io/exploitation/2017/03/19/0ctf-Quals-2017-BabyHeap2017.html)
+- [how2heap](https://github.com/shellphish/how2heap)
diff --git a/src/writeup/6.1.10_0ctf2017_babyheap2017/libc.so.6 b/src/writeup/6.1.10_0ctf2017_babyheap2017/libc.so.6
deleted file mode 100644
index 75c8795..0000000
Binary files a/src/writeup/6.1.10_0ctf2017_babyheap2017/libc.so.6 and /dev/null differ