diff --git a/ci/ray_ci/utils.py b/ci/ray_ci/utils.py
index a9d6159aa8a3..c6075af81098 100644
--- a/ci/ray_ci/utils.py
+++ b/ci/ray_ci/utils.py
@@ -18,7 +18,7 @@
 GLOBAL_CONFIG_FILE = (
     os.environ.get("RAYCI_GLOBAL_CONFIG") or "ci/ray_ci/oss_config.yaml"
 )
-RAY_VERSION = "3.0.0.dev0"
+RAY_VERSION = "2.31.0"
 
 
 def ci_init() -> None:
diff --git a/java/api/pom_template.xml b/java/api/pom_template.xml
index a7fdeb6bf23b..a2eb08d87b91 100644
--- a/java/api/pom_template.xml
+++ b/java/api/pom_template.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.ray</groupId>
     <artifactId>ray-superpom</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.31.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/java/performance_test/pom_template.xml b/java/performance_test/pom_template.xml
index fce0b10f8837..3f117cc8a8f6 100644
--- a/java/performance_test/pom_template.xml
+++ b/java/performance_test/pom_template.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.ray</groupId>
     <artifactId>ray-superpom</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.31.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/java/pom.xml b/java/pom.xml
index 958f735666d6..886d321b49b9 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>io.ray</groupId>
   <artifactId>ray-superpom</artifactId>
-  <version>2.0.0-SNAPSHOT</version>
+  <version>2.31.0</version>
   <packaging>pom</packaging>
   <name>Ray Project Parent POM</name>
   <description>An open source framework that provides a simple, universal API for building distributed applications.
@@ -63,7 +63,7 @@
   <properties>
     <java.version>1.8</java.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <project.version>2.0.0-SNAPSHOT</project.version>
+    <project.version>2.31.0</project.version>
   </properties>
 
   <dependencyManagement>
diff --git a/java/runtime/pom_template.xml b/java/runtime/pom_template.xml
index 69010485406e..0e86762b4511 100644
--- a/java/runtime/pom_template.xml
+++ b/java/runtime/pom_template.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.ray</groupId>
     <artifactId>ray-superpom</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.31.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/java/serve/pom_template.xml b/java/serve/pom_template.xml
index 9df520f0d2bc..b391cb9fa4d2 100644
--- a/java/serve/pom_template.xml
+++ b/java/serve/pom_template.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.ray</groupId>
     <artifactId>ray-superpom</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.31.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/java/test/pom_template.xml b/java/test/pom_template.xml
index 2d46e93b4371..72ece5b23df9 100644
--- a/java/test/pom_template.xml
+++ b/java/test/pom_template.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.ray</groupId>
     <artifactId>ray-superpom</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.31.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
diff --git a/python/ray/_version.py b/python/ray/_version.py
index ebc9a8b52868..75701f8b5ec2 100644
--- a/python/ray/_version.py
+++ b/python/ray/_version.py
@@ -1,6 +1,6 @@
 # Replaced with the current commit when building the wheels.
 commit = "{{RAY_COMMIT_SHA}}"
-version = "3.0.0.dev0"
+version = "2.31.0"
 
 if __name__ == "__main__":
     print("%s %s" % (version, commit))
diff --git a/src/ray/common/constants.h b/src/ray/common/constants.h
index 31e68c11339b..639a0521dbd0 100644
--- a/src/ray/common/constants.h
+++ b/src/ray/common/constants.h
@@ -64,7 +64,7 @@ constexpr int kMessagePackOffset = 9;
 constexpr char kSetupWorkerFilename[] = "setup_worker.py";
 
 /// The version of Ray
-constexpr char kRayVersion[] = "3.0.0.dev0";
+constexpr char kRayVersion[] = "2.31.0";
 
 /*****************************/
 /* ENV labels for autoscaler */