diff --git a/gradle.properties b/gradle.properties
index e02784c..a8b2f16 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -13,4 +13,4 @@
 # limitations under the License.
 
 group=com.tisonkun.os
-version=0.3.1
+version=0.4.0