diff --git a/.github/workflows/Specs.yml b/.github/workflows/Specs.yml
index 571c13b4b7..8dd2217dcd 100644
--- a/.github/workflows/Specs.yml
+++ b/.github/workflows/Specs.yml
@@ -7,7 +7,7 @@ jobs:
       matrix:
         task: [SPECS]
         ruby: [2.6, 2.7, 3.0]
-        os: [ubuntu-16.04]
+        os: [ubuntu-18.04]
         include:
           - task: SPECS
             os: macos-10.15