diff --git a/pipelines/cache-dependencies.yml b/pipelines/cache-dependencies.yml
index af0b971fd..b2a0d0d1c 100644
--- a/pipelines/cache-dependencies.yml
+++ b/pipelines/cache-dependencies.yml
@@ -17,7 +17,7 @@ jobs:
 
 - job: ubuntu_legacy
   pool:
-    vmImage: ubuntu-18.04
+    vmImage: ubuntu-20.04
   steps:
   - template: templates/cache-dependencies-template.yml
     parameters: