diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 95a42ac..f101421 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,12 +15,12 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup constants
         shell: bash
         run: |
-          TOIT_VERSION=v2.0.0-alpha.12
+          TOIT_VERSION=v2.0.0-alpha.118
           echo "TOIT_VERSION=$TOIT_VERSION" >> $GITHUB_ENV
           export DOWNLOAD_DIR="${{ github.workspace }}/downloads"
           echo "DOWNLOAD_DIR=$DOWNLOAD_DIR" >> $GITHUB_ENV
@@ -67,14 +67,14 @@ jobs:
       - name: Use new Python
         uses: actions/setup-python@v4
         with:
-          python-version: '3.x'
+          python-version: '3.11'
           architecture: x64
 
       - name: Fetch Python dependencies
         run: |
           pip install -r tests/requirements.txt
 
-      - uses: suisei-cn/actions-download-file@v1
+      - uses: suisei-cn/actions-download-file@v1.4.0
         name: Download Toit
         with:
           url: ${{ env.TOIT_URL }}
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f15b942..b137520 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -1,12 +1,28 @@
+# Zero-Clause BSD License
+
+# Copyright (C) 2023 Toitware ApS.
+
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted.
+
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
 name: Publish package
 on:
   push:
     tags:
-    - 'v*'
+    - 'v[0-9]+.[0-9]+.[0-9]+'
+    - 'v[0-9]+.[0-9]+.[0-9]+-*'
 jobs:
   create-release:
     name: Create new release
     runs-on: ubuntu-latest
     steps:
       - name: Publish
-        uses: toitlang/pkg-publish@v1.0.2
+        uses: toitlang/pkg-publish@v1.4.0
diff --git a/package.lock b/package.lock
index 2461262..abd5b41 100644
--- a/package.lock
+++ b/package.lock
@@ -1,7 +1,9 @@
+sdk: ^2.0.0-alpha.118
 prefixes:
   rs485: toit-rs485
 packages:
   toit-rs485:
     url: github.com/toitware/toit-rs485
-    version: 1.0.1
-    hash: 854d96a9d27b6ce7325a9698001087b292f4b4b5
+    name: rs485
+    version: 1.2.0
+    hash: 8e38736d19dab1d9275568df269f982e6118acec
diff --git a/package.yaml b/package.yaml
index 3407802..ed267a9 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,4 +1,8 @@
+name: modbus
+description: A Modbus Toit client.
+environment:
+  sdk: ^2.0.0-alpha.118
 dependencies:
   rs485:
     url: github.com/toitware/toit-rs485
-    version: ^1.0.1
+    version: ^1.2.0
diff --git a/tests/README.md b/tests/README.md
index 59f167d..64ce9f5 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -10,6 +10,8 @@ The safe choice is to consider them BSD as well.
 
 ## Installation
 
+pymodbus=3.0.0.dev4 requires the 'imp' module, which was removed with Python 3.12.
+
 Install with
 
 ``` shell
diff --git a/tests/package.lock b/tests/package.lock
index 92a01cf..9fa1deb 100644
--- a/tests/package.lock
+++ b/tests/package.lock
@@ -1,4 +1,4 @@
-sdk: ^1.6.10
+sdk: ^2.0.0-alpha.64
 prefixes:
   host: pkg-host
   modbus: ..
@@ -9,9 +9,11 @@ packages:
       rs485: toit-rs485
   pkg-host:
     url: github.com/toitlang/pkg-host
-    version: 1.6.0
-    hash: d05b91390e76c3543a9968b042aed330210bafa4
+    name: host
+    version: 1.11.0
+    hash: 7e7df6ac70d98a02f232185add81a06cec0d77e8
   toit-rs485:
     url: github.com/toitware/toit-rs485
-    version: 1.0.1
-    hash: 854d96a9d27b6ce7325a9698001087b292f4b4b5
+    name: rs485
+    version: 1.2.0
+    hash: 8e38736d19dab1d9275568df269f982e6118acec
diff --git a/tests/package.yaml b/tests/package.yaml
index 27fd0e5..56e5927 100644
--- a/tests/package.yaml
+++ b/tests/package.yaml
@@ -1,6 +1,6 @@
 dependencies:
   host:
     url: github.com/toitlang/pkg-host
-    version: ^1.6.0
+    version: ^1.11.0
   modbus:
     path: ..