diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2d90150..cb10177 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,12 +19,12 @@ jobs:
           - kernel: 'LATEST'
             runs_on: 'ubuntu-24.04'
             arch: 'x86_64'
-            llvm-version: '18'
+            llvm-version: '21'
             pahole: 'master'
           - kernel: 'LATEST'
             runs_on: 'ubuntu-24.04'
             arch: 'x86_64'
-            llvm-version: '18'
+            llvm-version: '21'
             pahole: 'tmp.master'
     name: Linux ${{ matrix.kernel }} llvm-${{ matrix.llvm-version }}
     uses: ./.github/workflows/vmtest.yml