diff --git a/.github/workflows/oats-tests.yml b/.github/workflows/oats-tests.yml
index b064b9f072..6d78706ce1 100644
--- a/.github/workflows/oats-tests.yml
+++ b/.github/workflows/oats-tests.yml
@@ -19,7 +19,7 @@ permissions:
 
 jobs:
   acceptance-tests:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     steps:
       - name: Check out
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -37,7 +37,7 @@ jobs:
         with:
           cache-read-only: true
 
-      - uses: jdx/mise-action@c2a87611a18de5b3828c5652fe268e992400cb5c # v4.3.0
+      - uses: jdx/mise-action@9149ea85001c7435d5a66bb127d6a1b6227cb0a5 # v5.0.0
 
       - name: Run OATS tests
         run: mise run oats-tests
diff --git a/.github/workflows/prometheus-test.yml b/.github/workflows/prometheus-test.yml
index 101991d476..a31bd11025 100644
--- a/.github/workflows/prometheus-test.yml
+++ b/.github/workflows/prometheus-test.yml
@@ -15,7 +15,7 @@ permissions:
 
 jobs:
   acceptance-tests:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     steps:
       - name: Check out
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
diff --git a/.github/workflows/reusable-lint-check.yml b/.github/workflows/reusable-lint-check.yml
index c33a32274c..279924d37a 100644
--- a/.github/workflows/reusable-lint-check.yml
+++ b/.github/workflows/reusable-lint-check.yml
@@ -15,7 +15,7 @@ jobs:
           fetch-depth: 0 # needed for merge-base used in modified-files mode
           persist-credentials: false
 
-      - uses: jdx/mise-action@c2a87611a18de5b3828c5652fe268e992400cb5c # v4.3.0
+      - uses: jdx/mise-action@9149ea85001c7435d5a66bb127d6a1b6227cb0a5 # v5.0.0
 
       - name: Lint for pull requests
         if: github.event_name == 'pull_request'