diff --git a/README.md b/README.md
index bcf512f..e5d8d6e 100644
--- a/README.md
+++ b/README.md
@@ -10,15 +10,15 @@
 [![GitHub Downloads](https://img.shields.io/github/downloads/yangao07/TideHunter/total.svg?style=social&logo=github&label=Download)](https://github.com/yangao07/TideHunter/releases)
 -->
 
-## Updates (v1.5.0)
-* Output fastq format
+## Updates (v1.5.1)
+* Fixed a bug related to abPOA
 
 
 ## Getting started
 Download the [latest release](https://github.com/yangao07/TideHunter/releases):
 ```
-wget https://github.com/yangao07/TideHunter/releases/download/v1.5.0/TideHunter-v1.5.0.tar.gz
-tar -zxvf TideHunter-v1.5.0.tar.gz && cd TideHunter-v1.5.0
+wget https://github.com/yangao07/TideHunter/releases/download/v1.5.1/TideHunter-v1.5.1.tar.gz
+tar -zxvf TideHunter-v1.5.1.tar.gz && cd TideHunter-v1.5.1
 ```
 Make from source and run with test data:
 ```
@@ -78,9 +78,9 @@ Make sure you have gcc (>=6.4.0) and zlib installed before compiling.
 It is recommended to download the latest release of TideHunter 
 from the [release page](https://github.com/yangao07/TideHunter/releases).
 ```
-wget https://github.com/yangao07/TideHunter/releases/download/v1.5.0/TideHunter-v1.5.0.tar.gz
-tar -zxvf TideHunter-v1.5.0.tar.gz
-cd TideHunter-v1.5.0; make
+wget https://github.com/yangao07/TideHunter/releases/download/v1.5.1/TideHunter-v1.5.1.tar.gz
+tar -zxvf TideHunter-v1.5.1.tar.gz
+cd TideHunter-v1.5.1; make
 ```
 Or, you can use `git clone` command to download the source code. 
 Don't forget to include the `--recursive` to download the codes of [abPOA](https://github.com/yangao07/abPOA).
@@ -93,8 +93,8 @@ cd TideHunter; make
 ### <a name="binary"></a>Pre-built binary executable file for Linux/Unix 
 If you meet any compiling issue, please try the pre-built binary file:
 ```
-wget https://github.com/yangao07/TideHunter/releases/download/v1.5.0/TideHunter-v1.5.0_x64-linux.tar.gz
-tar -zxvf TideHunter-v1.5.0_x64-linux.tar.gz
+wget https://github.com/yangao07/TideHunter/releases/download/v1.5.1/TideHunter-v1.5.1_x64-linux.tar.gz
+tar -zxvf TideHunter-v1.5.1_x64-linux.tar.gz
 ```
 
 ## <a name="start"></a>Getting started with toy example in `test_data`
diff --git a/src/main.c b/src/main.c
index 840e425..91962e7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -10,7 +10,7 @@
 #include "kseq.h"
 
 const char PROG[20] = "TideHunter";
-const char VERSION[20] = "1.5.0";
+const char VERSION[20] = "1.5.1";
 const char CONTACT[30] = "gaoy286@mail.sysu.edu.cn";
 
 const struct option mini_tandem_opt [] = {