diff --git a/README.md b/README.md
index 10aeb93..eda7a9f 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ In this case, you need to implement your own OAuth provider working with web fra
 
 ```scala
 libraryDependencies ++= Seq(
-  "com.nulab-inc" %% "scala-oauth2-core" % "1.3.0"
+  "com.nulab-inc" %% "scala-oauth2-core" % "1.4.0"
 )
 ```
 
diff --git a/build.sbt b/build.sbt
index 2eba56c..5caae4c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -65,6 +65,6 @@ lazy val root = (project in file("."))
     scalaOAuth2ProviderSettings,
     name := "scala-oauth2-core",
     description := "OAuth 2.0 server-side implementation written in Scala",
-    version := "1.3.1-SNAPSHOT",
+    version := "1.4.0",
     libraryDependencies ++= commonDependenciesInTestScope
   )