diff --git a/.github/workflows/sync-dist.yml b/.github/workflows/sync-dist.yml
index 89da328..b4d29f7 100644
--- a/.github/workflows/sync-dist.yml
+++ b/.github/workflows/sync-dist.yml
@@ -20,7 +20,7 @@ concurrency:
 jobs:
   rebuild-dist:
     name: Rebuild dist
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 15
     outputs:
       base-sha: ${{ steps.rebuild.outputs.base-sha }}
@@ -68,7 +68,7 @@ jobs:
     name: Sync dist
     needs: rebuild-dist
     if: needs.rebuild-dist.outputs.changed == 'true'
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 372f265..dc99f9a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ concurrency:
 jobs:
   validate:
     name: Lint, typecheck, and build
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
@@ -32,7 +32,7 @@ jobs:
 
   test:
     name: Tests and coverage
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
@@ -49,7 +49,7 @@ jobs:
 
   check-dist:
     name: Committed dist matches build
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
@@ -96,7 +96,7 @@ jobs:
       - validate
       - test
       - check-dist
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-26.04
     timeout-minutes: 2
     permissions: {}
     steps: