diff --git a/budoux/__init__.py b/budoux/__init__.py
index e62c8afd..af76c0f1 100644
--- a/budoux/__init__.py
+++ b/budoux/__init__.py
@@ -15,7 +15,7 @@
 
 from . import parser
 
-__version__ = "0.7.0"
+__version__ = "0.8.0rc1"
 
 Parser = parser.Parser
 load_default_japanese_parser = parser.load_default_japanese_parser
diff --git a/java/pom.xml b/java/pom.xml
index fb99acec..a5b5c6ef 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -26,7 +26,7 @@
 
   <groupId>com.google.budoux</groupId>
   <artifactId>budoux</artifactId>
-  <version>0.7.0</version>
+  <version>0.8.0-rc1</version>
 
   <name>BudouX</name>
   <url>https://google.github.io/budoux/</url>
diff --git a/javascript/package-lock.json b/javascript/package-lock.json
index bfc3ea04..ee0eeae5 100644
--- a/javascript/package-lock.json
+++ b/javascript/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "budoux",
-  "version": "0.7.0",
+  "version": "0.8.0-rc1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "budoux",
-      "version": "0.7.0",
+      "version": "0.8.0-rc1",
       "license": "Apache-2.0",
       "dependencies": {
         "commander": "^14.0.0",
diff --git a/javascript/package.json b/javascript/package.json
index 472defe7..511ff547 100644
--- a/javascript/package.json
+++ b/javascript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "budoux",
-  "version": "0.7.0",
+  "version": "0.8.0-rc1",
   "description": "A small chunk segmenter.",
   "author": "Shuhei Iitsuka",
   "license": "Apache-2.0",
diff --git a/javascript/src/cli.ts b/javascript/src/cli.ts
index 465cb744..8d334d49 100644
--- a/javascript/src/cli.ts
+++ b/javascript/src/cli.ts
@@ -24,7 +24,7 @@ import {
   loadDefaultParsers,
 } from './index.js';
 
-const CLI_VERSION = '0.7.0';
+const CLI_VERSION = '0.8.0-rc1';
 const defaultParsers = loadDefaultParsers();
 
 /**