diff --git a/.CI/checkHTMLDoc/checkLinks.py b/.CI/checkHTMLDoc/checkLinks.py
index 7869851d..5ea8cc57 100644
--- a/.CI/checkHTMLDoc/checkLinks.py
+++ b/.CI/checkHTMLDoc/checkLinks.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 '''
-Copyright (C) 2020-2024, Modelica Association and contributors
+Copyright (C) 2020-2026, Modelica Association and contributors
 All rights reserved.
 
 Check Modelica HTML documentation for link validity
diff --git a/.CI/checkHTMLDoc/checkTags.py b/.CI/checkHTMLDoc/checkTags.py
index b4f9f760..12bcf65f 100644
--- a/.CI/checkHTMLDoc/checkTags.py
+++ b/.CI/checkHTMLDoc/checkTags.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 '''
-Copyright (C) 2020-2024, Modelica Association and contributors
+Copyright (C) 2020-2026, Modelica Association and contributors
 All rights reserved.
 
 Check Modelica HTML documentation for tag validity
diff --git a/.CI/checkHTMLDoc/tidyHTML.py b/.CI/checkHTMLDoc/tidyHTML.py
index 7a9a018b..85f47f63 100644
--- a/.CI/checkHTMLDoc/tidyHTML.py
+++ b/.CI/checkHTMLDoc/tidyHTML.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 '''
-Copyright (C) 2020-2024, Modelica Association and contributors
+Copyright (C) 2020-2026, Modelica Association and contributors
 All rights reserved.
 
 Check Modelica HTML documentation with HTML Tidy
diff --git a/.CI/check_html.py b/.CI/check_html.py
index a0bcc3cc..6e95c02f 100644
--- a/.CI/check_html.py
+++ b/.CI/check_html.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 '''
-Copyright (C) 2020-2024, Modelica Association and contributors
+Copyright (C) 2020-2026, Modelica Association and contributors
 All rights reserved.
 
 Check Modelica HTML documentation for validity
diff --git a/.github/workflows/checkCI.yml b/.github/workflows/checkCI.yml
index a3a6b7c5..030d8401 100644
--- a/.github/workflows/checkCI.yml
+++ b/.github/workflows/checkCI.yml
@@ -7,11 +7,12 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - name: Setup python environment
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install python packages
@@ -24,7 +25,8 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - name: Get moparser
@@ -38,15 +40,17 @@ jobs:
           echo "::add-matcher::./.github/moparser.json"
           ModelicaSyntaxChecker/Linux64/moparser -v 3.6 -r Modelica_LinearSystems2 LinearSystems2Test LinearSystems2TestConversion3.mo ObsoleteLinearSystems2.mo
           echo "::remove-matcher owner=moparser::"
+
   deprecation_checks:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - name: Setup python environment
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Check deprecated Text.lineColor annotation
diff --git a/.github/workflows/checkCron.yml b/.github/workflows/checkCron.yml
index 35c08dd6..2e48a759 100644
--- a/.github/workflows/checkCron.yml
+++ b/.github/workflows/checkCron.yml
@@ -11,11 +11,11 @@ jobs:
     if: github.repository_owner == 'modelica'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - name: Setup python environment
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install python packages
@@ -28,11 +28,11 @@ jobs:
     if: github.repository_owner == 'modelica'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - name: Setup python environment
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.8
       - name: Install python packages
diff --git a/.github/workflows/label.yml b/.github/workflows/label.yml
index d4ef08ed..dbd6b661 100644
--- a/.github/workflows/label.yml
+++ b/.github/workflows/label.yml
@@ -14,7 +14,7 @@ jobs:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/labeler@v5
+      - uses: actions/labeler@v6
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           sync-labels: false