diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 47a8b7f1..a7a6e34e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ concurrency:
 jobs:
   conventional-subject:
     name: conventional subject
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     # Only a pull request has a title. A push to main is the squash of one
     # that passed this, carrying the subject this already read.
@@ -70,7 +70,7 @@ jobs:
 
   flake-check:
     name: nix flake check
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 60
     steps:
       # Actions are pinned by commit because a tag is mutable and an action
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 74b30acb..d83744b6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -69,7 +69,7 @@ jobs:
   # with — they are not a release at all.
   detect:
     name: is this merge a release
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     # A candidate waits here for CI's verdict on the commit it is cut from.
     timeout-minutes: ${{ github.event.inputs.from == 'candidate' && 45 || 5 }}
     # Every line here sits at one indentation on purpose: a folded scalar
@@ -380,7 +380,7 @@ jobs:
   release:
     name: publish v${{ needs.detect.outputs.version }}
     needs: [detect, darwin-binaries, linux-binaries]
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 60
     # `contents` is the tag push and the Release; `actions` is CI's verdict,
     # which this job now waits for rather than re-deriving; `packages` is the
@@ -774,7 +774,7 @@ jobs:
     name: publish plugin-v${{ needs.detect.outputs.plugin_version }}
     needs: detect
     if: needs.detect.outputs.plugin_release == 'true'
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 30
     # npm trusts only a run in this environment, and the environment admits
     # only main and plugin-v* tags, the refs a release, a candidate and their