diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 496a70a..1599492 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
       run: |
         cd gui
         dir
-        conda create --name ETA python=3.10
+        conda create --name ETA python=3.11
         conda activate ETA
         conda install conda-forge::conda-pack
         pip install --find-links=.\ etabackend
@@ -122,7 +122,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.9", "3.10"]
+        python-version: ["3.9", "3.11"]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
@@ -136,5 +136,5 @@ jobs:
           path: dist
     - name: Test with pytest
       run: |
-        python -m pip install tox==3.28.0 tox-gh-actions==2.12.0 tox-external-wheels 
-        tox --external_wheels 'dist/*.whl'
+        python -m pip install tox tox-gh-actions 
+        tox 
diff --git a/etabackend/static/help.html b/etabackend/static/help.html
index 15d3c81..55dd150 100644
--- a/etabackend/static/help.html
+++ b/etabackend/static/help.html
@@ -50,7 +50,7 @@
             <a href="https://eta.readthedocs.io/" target="_blank">ONLINE
                 DOCUMENTATION</a>
             
-            <a href="https://github.com/timetag/ETA/releases"  target="_blank" >ETA GUI Version: 0.9.8</a>
+            <a href="https://github.com/timetag/ETA/releases"  target="_blank" >ETA GUI Version: 0.9.9</a>
             <a href="#" class="menu-link"  id="btn_close">Exit</a>
         </div>
     </div>
diff --git a/gui/package.json b/gui/package.json
index 4bd856f..f31792b 100644
--- a/gui/package.json
+++ b/gui/package.json
@@ -4,7 +4,7 @@
   "author": "Zuzeng Lin",
   "repository": "github:timetag/ETA",
   "homepage": "http://timetag.github.io",
-  "version": "0.9.8",
+  "version": "0.9.9",
   "description": "ETA is a graphical event-driven programming language for time-tag processing.",
   "scripts": {
     "dev": "electron .",
@@ -17,7 +17,7 @@
   "build": {
     "appId": "com.eta.client",
     "productName": "ETA",
-    "copyright": "Copyright (C) 2023 Zuzeng Lin",
+    "copyright": "Copyright (C) 2024 Zuzeng Lin",
     "mac": {
       "category": "public.app-category.utilities",
       "publish": [
diff --git a/setup.py b/setup.py
index a861828..1507de3 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 setuptools.setup(
     name="etabackend",
-    version="0.9.8",
+    version="0.9.9",
     author="ETA Team",
     description="Extensible Timetag Analyzer",
     include_package_data=True,
diff --git a/tox.ini b/tox.ini
index 32613d3..22f5912 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,14 @@
 # tox.ini
 [tox]
-envlist = py39, py310
+envlist = py39,  py311
 [gh-actions]
 python =
-    3.10: py310
+    3.11: py311
     3.9: py39
 [testenv]
 description = Unit tests
 deps = 
     pytest
     -rrequirements.txt
+package_glob = 'dist/*.whl'
 commands = pytest