diff --git a/.github/workflows/package_llvm.yml b/.github/workflows/package_llvm.yml
index 4e128cf..fdb4900 100644
--- a/.github/workflows/package_llvm.yml
+++ b/.github/workflows/package_llvm.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   build-linux:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/upload_clang.yml b/.github/workflows/upload_clang.yml
index ecfac6c..65dba4f 100644
--- a/.github/workflows/upload_clang.yml
+++ b/.github/workflows/upload_clang.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: install requirements