diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce5f497..bd37062 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,10 @@
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [3.10.0] - 2023-04-10
+## [3.11.0] - 2023-08-12
+  - Add support for Zacas extension
+
+## [3.10.0] - 2023-08-12
   - Add support for Zfa extension
 
 ## [3.9.2] - 2023-07-21
diff --git a/riscv_config/__init__.py b/riscv_config/__init__.py
index 9670c0e..2a42fa5 100644
--- a/riscv_config/__init__.py
+++ b/riscv_config/__init__.py
@@ -1,3 +1,3 @@
 from pkgutil import extend_path
 __path__ = extend_path(__path__, __name__)
-__version__ = '3.10.0'
+__version__ = '3.11.0'
\ No newline at end of file
diff --git a/riscv_config/constants.py b/riscv_config/constants.py
index fa9465a..a698799 100644
--- a/riscv_config/constants.py
+++ b/riscv_config/constants.py
@@ -23,7 +23,7 @@
 Z_extensions = [
         "Zicbom", "Zicbop", "Zicboz", "Zicntr", "Zicsr", "Zicond", "Zifencei", "Zihintpause", "Zihpm",
         "Zmmul",
-        "Zam",
+        "Zam", "Zacas",
         "Zfh", "Zfa",
         "Zfinx", "Zdinx", "Zhinx", "Zhinxmin",
         "Ztso",
diff --git a/setup.cfg b/setup.cfg
index 0585c59..eaa85b5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.10.0
+current_version = 3.11.0
 commit = True
 tag = True