diff --git a/build.gradle b/build.gradle
index 78715a136..c53e75524 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ apply from: project.rootProject.file('gradle/dokka.gradle')
 
 allprojects {
     group = 'org.jetbrains.kotlinx'
-    version = '0.4.0-alpha-6'
+    version = '0.4.0'
 
     apply plugin: "maven-publish"
     apply plugin: "kotlin"