diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34289f0..4c61ace 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## v1.2.0
+
 ### Added
 
 - Add initial draft on stabilizer simulation using stim backend
@@ -14,6 +16,8 @@
 
 - Better contractor infrastructures with "breakpoint" contractor to simply get the networks
 
+- Contractor and quantum operator codebase refactored: enable distributed computation power
+
 ## 1.1.0
 
 ### Added
diff --git a/tensorcircuit/__init__.py b/tensorcircuit/__init__.py
index 2e8a025..97d339f 100644
--- a/tensorcircuit/__init__.py
+++ b/tensorcircuit/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "1.1.0"
+__version__ = "1.2.0"
 __author__ = "TensorCircuit Authors"
 __creator__ = "refraction-ray"