diff --git a/.github/workflows/docs_ci.yml b/.github/workflows/docs_ci.yml
index a671ab6675..a6251594e0 100644
--- a/.github/workflows/docs_ci.yml
+++ b/.github/workflows/docs_ci.yml
@@ -6,7 +6,7 @@ on: [push, pull_request]
 
 jobs:
   check-markdown:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     timeout-minutes: 5
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/gen_vc.yml b/.github/workflows/gen_vc.yml
index 0414a7a271..406b0e55b7 100644
--- a/.github/workflows/gen_vc.yml
+++ b/.github/workflows/gen_vc.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   build-vc:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Build V
diff --git a/.github/workflows/module_docs.yml b/.github/workflows/module_docs.yml
index 77de954c66..f1bb0c7e02 100644
--- a/.github/workflows/module_docs.yml
+++ b/.github/workflows/module_docs.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build-module-docs:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v2
     - name: Build V