diff --git a/.github/workflows/rssguard.yml b/.github/workflows/rssguard.yml
index c828c331f..dfe5756ee 100755
--- a/.github/workflows/rssguard.yml
+++ b/.github/workflows/rssguard.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Check script syntax
         run: bash -n ./resources/scripts/github-actions/build-linux-mac.sh
@@ -46,7 +46,7 @@ jobs:
             use_qt5: "ON"
     steps:         
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
           submodules: true
@@ -60,7 +60,7 @@ jobs:
           FEEDLY_CLIENT_SECRET: ${{ secrets.FEEDLY_CLIENT_SECRET }}
 
       - name: Upload binaries
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           if-no-files-found: error
           name: RSS_Guard-${{ runner.os }}${{ matrix.no_lite == 'ON' && '-' || '-nowebengine-' }}Qt${{ matrix.use_qt5 == 'ON' && '5' || '6' }}
@@ -80,7 +80,7 @@ jobs:
 
     steps:
       - name: Download binaries from previous jobs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts
 
diff --git a/docs/source/features/filters.md b/docs/source/features/filters.md
index 7cc0a04db..e150afa06 100644
--- a/docs/source/features/filters.md
+++ b/docs/source/features/filters.md
@@ -5,7 +5,7 @@ Sometimes you need to automatically tweak the incoming article - mark it starred
 ## `Article filters` dialog
 The dialog seen below offers you a way of managing your article filters. You can assign single filter to multiple feeds.
 
-`Test` button tests selected filter against existing messages. `Process checked feeds` runs the filter against messages from checked feeds.
+`Test` button tests selected filter against existing messages. `Process checked feeds` runs the filter against existing messages from checked feeds - in this mode all modifications made by the filter are saved to existing messages.
 
 <img alt="alt-img" src="images/filters-dialog.png" width="600px">
 
@@ -296,4 +296,4 @@ function filterMessage() {
 
   return MessageObject.Accept;
 }
-```
\ No newline at end of file
+```
diff --git a/resources/desktop/rssguard.metainfo.xml.in b/resources/desktop/rssguard.metainfo.xml.in
index cfc23d281..60e44cf05 100644
--- a/resources/desktop/rssguard.metainfo.xml.in
+++ b/resources/desktop/rssguard.metainfo.xml.in
@@ -5,7 +5,9 @@
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0</project_license>
   <name>@APPDATA_NAME@</name>
-  <developer_name>Martin Rotter</developer_name>
+  <developer id="io.github.martinrotter">
+    <name>Martin Rotter</name>
+  </developer>
   <update_contact>rotter.martinos_AT_gmail.com</update_contact>
   <summary>@APPDATA_SUMMARY@</summary>
   <description>
@@ -65,7 +67,6 @@
     <keyword translate="no">The Old Reader</keyword>
     <keyword translate="no">Tiny Tiny RSS</keyword>
   </keywords>
-  <content_rating type="oars-1.0" />
   <content_rating type="oars-1.1" />
   <releases>
     <release version="@APP_VERSION@" date="@DATE@">
diff --git a/resources/scripts/github-actions/build-linux-mac.sh b/resources/scripts/github-actions/build-linux-mac.sh
index f790ba98f..081e4e57d 100755
--- a/resources/scripts/github-actions/build-linux-mac.sh
+++ b/resources/scripts/github-actions/build-linux-mac.sh
@@ -42,7 +42,7 @@ if [ $is_linux = true ]; then
   sudo add-apt-repository ppa:beineri/opt-qt-5.15.4-focal -y
   sudo apt-get update
 
-  sudo apt-get -qy install qt515tools qt515base qt515webengine qt515svg qt515multimedia qt515imageformats appstream-util
+  sudo apt-get -qy install qt515tools qt515base qt515webengine qt515svg qt515multimedia qt515imageformats appstream
   sudo apt-get -qy install cmake ninja-build openssl libssl-dev libgl1-mesa-dev gstreamer1.0-alsa gstreamer1.0-nice gstreamer1.0-plugins-good gstreamer1.0-plugins-base gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-qt5 gstreamer1.0-pulseaudio libmpv-dev
 
   # The script below performs some broken testing, which ends up tripping 'set -e'.
@@ -93,7 +93,7 @@ cmake --install . --prefix "$prefix"
 if [ $is_linux = true ]; then
   # Validate AppStream metadata.
   echo 'Validating AppStream metadata...'
-  appstream-util validate-relax "$prefix/share/metainfo/$app_id.metainfo.xml"
+  appstreamcli validate "$prefix/share/metainfo/$app_id.metainfo.xml"
   # Obtain linuxdeployqt.
   wget -qc https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage
   chmod a+x linuxdeployqt-continuous-x86_64.AppImage