diff --git a/CHANGES.txt b/CHANGES.txt
index 16d4a9d2..f5aa537d 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,7 @@
+Release 1.0.0 - 2023-01-24
+ - Upgrade to Guava 31.1
+ - Breaking: Use Java Optional instead of Guava Optional
+
 Release 0.9.7 - 2023-01-19
  - Support showDatabase API
 
diff --git a/pom.xml b/pom.xml
index 15e216f5..4dcac2ba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <artifactId>td-client</artifactId>
   <name>Treasure Data Client for Java</name>
   <description>Treasure Data Client for Java.</description>
-  <version>0.9.8-SNAPSHOT</version>
+  <version>1.0.0</version>
   <packaging>jar</packaging>
   <url>https://github.com/treasure-data/td-client-java</url>