diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index c07d71a..c182d02 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -22,7 +22,7 @@ jobs:
 
   build-rust:
     name: Build (Rust)
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     strategy:
       matrix: