diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 098390e..c87b860 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   standard:
     name: "Standard"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     steps:
       - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
@@ -20,7 +20,8 @@ jobs:
       - run: bundle exec rake standard
   build:
     name: "Test / Ruby ${{ matrix.ruby }}"
-    runs-on: ubuntu-latest
+    # rb-sys generates incompatible Ruby bindings with ubuntu-26.04's libclang.
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         ruby: ["3.3", "3.4"]
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index 277e7d6..3035369 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -11,7 +11,7 @@ permissions:
 
 jobs:
   update_release_draft:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
     steps:
       - uses: release-drafter/release-drafter@v7
         env: