diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e06477979e..b773c2bf39 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
     steps:
     - name: Dump GitHub context
       env:
@@ -116,7 +116,7 @@ jobs:
         path: mpy-cross/mpy-cross
 
   build-arm:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
     needs: test
     strategy:
       fail-fast: false
@@ -281,7 +281,7 @@ jobs:
       if: github.event_name == 'push' || (github.event_name == 'release' && (github.event.action == 'published' || github.event.action == 'rerequested'))
 
   build-riscv:
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
     needs: test
     strategy:
       fail-fast: false