diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index b573f57..379a01e 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.3.0
+current_version = 1.4.0-beta.1
 commit = True
 tag = True
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(-(?P<stage>[^.]*)\.(?P<devnum>\d+))?
diff --git a/setup.py b/setup.py
index 3dbd162..15507d0 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
     setup,
 )
 
-VERSION = "1.3.0"
+VERSION = "1.4.0-beta.1"
 DESCRIPTION = 'Python SDK for Conflux network'
 with open('./README.md') as readme:
     long_description = readme.read()
diff --git a/tests/base_features/test_api.py b/tests/base_features/test_api.py
index cfc398f..db318fe 100644
--- a/tests/base_features/test_api.py
+++ b/tests/base_features/test_api.py
@@ -1,4 +1,4 @@
 def test_api_version(w3):
-    expected_version = "1.3.0"
+    expected_version = "1.4.0-beta.1"
     if "beta" not in expected_version:
         assert w3.api.startswith(expected_version)