diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05b4c7c..c7712d3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Download openFrameworks
         run: curl -fL https://github.com/openframeworks/openFrameworks/releases/download/0.12.1/of_v0.12.1_osx_release.tar.gz -o /tmp/of.tar.gz
       - run: tar -xzf /tmp/of.tar.gz -C /tmp
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: ofxDataNet
       - name: Install addon
diff --git a/README.md b/README.md
index abf90fa..bff147c 100644
--- a/README.md
+++ b/README.md
@@ -15,10 +15,9 @@ Native DataNet realtime pub/sub for openFrameworks. Connect an openFrameworks ap
 ## Compatibility
 
 - openFrameworks 0.12.1
-- macOS, Windows, and Linux
 - C++17
 
-The examples and macOS CI target the latest stable openFrameworks release. The networking code uses portable openFrameworks and libcurl APIs for Windows and Linux as well. Please open an issue if you need an older OF version.
+The examples and CI currently verify macOS against the latest stable openFrameworks release. The networking code uses portable openFrameworks and libcurl APIs intended for Windows and Linux as well, but those platforms are not yet covered by CI. Please open an issue if you need an older OF version.
 
 ## Install
 
@@ -93,7 +92,7 @@ The repository follows the ofxAddons naming and layout conventions: the addon is
 
 ## Release checklist
 
-1. Build all examples against openFrameworks 0.12.1 on at least macOS; CI also checks Linux.
+1. Build all examples against openFrameworks 0.12.1 on macOS; test Windows and Linux before claiming verified support for those platforms.
 2. Tag the merged commit, for example `v0.1.0`, and create a GitHub release.
 3. Confirm the public repository appears on ofxAddons.