diff --git a/codalab/common.py b/codalab/common.py
index 838de64b8..7bb018716 100644
--- a/codalab/common.py
+++ b/codalab/common.py
@@ -8,7 +8,7 @@
 
 # Increment this on master when ready to cut a release.
 # http://semver.org/
-CODALAB_VERSION = '0.3.3'
+CODALAB_VERSION = '0.4.0'
 
 
 class IntegrityError(ValueError):
diff --git a/docs/REST-API-Reference.md b/docs/REST-API-Reference.md
index f7f994f33..fac6238b6 100644
--- a/docs/REST-API-Reference.md
+++ b/docs/REST-API-Reference.md
@@ -1,6 +1,6 @@
 # REST API Reference
 
-_version 0.3.3_
+_version 0.4.0_
 
 This reference and the REST API itself is still under heavy development and is
 subject to change at any time. Feedback through our GitHub issues is appreciated!
diff --git a/frontend/src/constants.js b/frontend/src/constants.js
index 382f99fdd..2e8b4fa6f 100644
--- a/frontend/src/constants.js
+++ b/frontend/src/constants.js
@@ -1,2 +1,2 @@
 // Should match codalab/common.py#CODALAB_VERSION
-export const CODALAB_VERSION = '0.3.3';
+export const CODALAB_VERSION = '0.4.0';
diff --git a/setup.py b/setup.py
index 6652a3436..b50d59890 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 import setuptools
 
 # should match codalab/common.py#CODALAB_VERSION
-CODALAB_VERSION = "0.3.3"
+CODALAB_VERSION = "0.4.0"
 
 if int(setuptools.__version__.split('.')[0]) < 25:
     print(
diff --git a/worker/setup.py b/worker/setup.py
index 5a6f6e6ba..e3fc35bcd 100644
--- a/worker/setup.py
+++ b/worker/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 # should match codalab/common.py#CODALAB_VERSION
-CODALAB_VERSION = "0.3.3"
+CODALAB_VERSION = "0.4.0"
 
 
 def get_requirements(*requirements_file_paths):