diff --git a/src/java/java-stream/pom.xml b/src/java/java-stream/pom.xml
index ffaee72..d28a3d5 100644
--- a/src/java/java-stream/pom.xml
+++ b/src/java/java-stream/pom.xml
@@ -7,7 +7,7 @@
 
     <artifactId>java-stream</artifactId>
     <groupId>javastream</groupId>
-    <version>3.4.0</version>
+    <version>4.0</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/src/java/java-stream/src/main/java/javastream/Main.java b/src/java/java-stream/src/main/java/javastream/Main.java
index 32b67a4..2442128 100644
--- a/src/java/java-stream/src/main/java/javastream/Main.java
+++ b/src/java/java-stream/src/main/java/javastream/Main.java
@@ -337,7 +337,7 @@ public class Main {
     }
   }
 
-  private static final String VERSION = "3.4";
+  private static final String VERSION = "4.0";
 
   private static final float START_SCALAR = 0.4f;
   private static final float START_A = 0.1f;
diff --git a/src/julia/JuliaStream.jl/Project.toml b/src/julia/JuliaStream.jl/Project.toml
index 9c7d49d..f8095e0 100644
--- a/src/julia/JuliaStream.jl/Project.toml
+++ b/src/julia/JuliaStream.jl/Project.toml
@@ -1,7 +1,7 @@
 name = "JuliaStream"
 uuid = "1bdcc9b7-f5ed-4705-bc7b-be1b748ec681"
 authors = ["Wei-Chen Lin <wl14928@bristol.ac.uk>"]
-version = "3.4.0"
+version = "4.0"
 
 [deps]
 AMDGPU = "21141c5a-9bdb-4563-92ae-f87d6854732e"
diff --git a/src/julia/JuliaStream.jl/src/Stream.jl b/src/julia/JuliaStream.jl/src/Stream.jl
index 1905c81..755fe2b 100644
--- a/src/julia/JuliaStream.jl/src/Stream.jl
+++ b/src/julia/JuliaStream.jl/src/Stream.jl
@@ -158,7 +158,7 @@ end
 
 const DefaultInit = (0.1, 0.2, 0.0)
 const DefaultScalar = 0.4
-const Version = "3.4.0"
+const Version = "4.0"
 
 function main()
 
diff --git a/src/rust/rust-stream/Cargo.toml b/src/rust/rust-stream/Cargo.toml
index f0365a6..c0a3608 100644
--- a/src/rust/rust-stream/Cargo.toml
+++ b/src/rust/rust-stream/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rust-stream"
-version = "3.4.0"
+version = "4.0"
 authors = ["Wei-Chen Lin <wl14928@bristol.ac.uk>"]
 edition = "2018"
 
diff --git a/src/scala/scala-stream/build.sbt b/src/scala/scala-stream/build.sbt
index 4194acb..49164f6 100644
--- a/src/scala/scala-stream/build.sbt
+++ b/src/scala/scala-stream/build.sbt
@@ -4,7 +4,7 @@ lazy val root = (project in file("."))
   .enablePlugins(NativeImagePlugin)
   .settings(
     scalaVersion := "3.0.0",
-    version := "3.4.0",
+    version := "4.0",
     organization := "uk.ac.bristol.uob-hpc",
     organizationName := "University of Bristol",
     Compile / mainClass := mainCls,
diff --git a/src/scala/scala-stream/src/main/scala/scalastream/ScalaStream.scala b/src/scala/scala-stream/src/main/scala/scalastream/ScalaStream.scala
index 4ed90e4..9c011a6 100644
--- a/src/scala/scala-stream/src/main/scala/scalastream/ScalaStream.scala
+++ b/src/scala/scala-stream/src/main/scala/scalastream/ScalaStream.scala
@@ -108,7 +108,7 @@ given DoubleFractional: Fractional[Double] with
 
 object App:
 
-  final val Version: String = "3.4.0"
+  final val Version: String = "4.0"
 
   case class Config[@specialized(Double, Float) A](
       options: Options,