diff --git a/build.gradle b/build.gradle
index ec24c759..d53d7659 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ apply plugin: 'com.github.johnrengelman.shadow'
 
 group = 'org.komamitsu'
 archivesBaseName = 'fluency'
-version = '1.8.0'
+version = '1.9.0-SNAPSHOT'
 
 sourceCompatibility = 1.6
 targetCompatibility = 1.6