diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8b0360dda..77a3262679 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
                 arch: [x86_64, riscv64, aarch64, x86]
                 builds: [mlibc, mlibc-static, mlibc-shared, mlibc-ansi-only, mlibc-headers-only]
         name: Build mlibc
-        runs-on: ubuntu-22.04
+        runs-on: ubuntu-20.04
         container:
           image: ghcr.io/managarm/mlibc-crossers:latest
         steps: