diff --git a/CHANGELOG.md b/CHANGELOG.md
index f084ef4..6362de8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [v0.49] (2023-04-12)
+[v0.49]: https://github.com/CoboCustody/cobo-java-api/compare/v0.48...v0.49
+
+### Changed
+- Add get standard tx by request_ids api. https://github.com/CoboCustody/cobo-java-api/pull/54
+
 ## [v0.48] (2023-04-10)
 [v0.48]: https://github.com/CoboCustody/cobo-java-api/compare/v0.47...v0.48
 
diff --git a/README.md b/README.md
index 8ad9084..44952cf 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ gradle:
 
 ```
 dependencies {
-    implementation 'com.github.CoboCustody:cobo-java-api:v0.48'
+    implementation 'com.github.CoboCustody:cobo-java-api:v0.49'
 }
 ```
 
@@ -90,7 +90,7 @@ maven:
 <dependency>
     <groupId>com.github.CoboCustody</groupId>
     <artifactId>cobo-java-api</artifactId>
-    <version>v0.48</version>
+    <version>v0.49</version>
 </dependency>
 ```