diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b9a001c..6c45c27 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 3.7
@@ -23,7 +23,7 @@ jobs:
           interrogate -v --ignore-init-method --ignore-module --ignore-nested-functions --ignore-regex "__repr__" --fail-under 60 mim
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     env:
       CUDA: 10.1.105-1
       CUDA_SHORT: 10.1