diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e551b23..cc59ac1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ env:
 jobs:
     PHPUnit:
 
-        runs-on: ubuntu-18.04
+        runs-on: ubuntu-20.04
         strategy:
             fail-fast: false
             matrix: