diff --git a/quafu/__init__.py b/quafu/__init__.py
index 623a1086..61140be1 100644
--- a/quafu/__init__.py
+++ b/quafu/__init__.py
@@ -21,4 +21,4 @@
 
 
 def get_version():
-    return "0.4.1"
+    return "0.4.2"
diff --git a/setup.py b/setup.py
index 287026a3..a8133e64 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ def parse_requirements(filename):
 
 setup(
     name="pyquafu",
-    version="0.4.1",
+    version="0.4.2",
     author="ssli",
     author_email="ssli@iphy.ac.cn",
     url="https://github.com/ScQ-Cloud/pyquafu",